Biologists have succeeded in assembling a synthetic cell in the lab that is fully capable of reproducing itself.

It’s been said that the 19th century was the chemistry century with the development of new sources of energy from coal and oil, new techniques for industrial scale production of metals and other materials as well as the discovery of new explosives like nitro-glycerin and dynamite. The 20th century has been called the physics century because of advances in electronics and nuclear science, radio, X-rays and magnetic resonance imaging.

Over the last two centuries the sciences of Chemistry and Physics have reshaped our world. (Credit: R. A. Lawler)

The 21st century is expected to be the biology century and it’s off to a good start with both rapid DNA sequencing and CRISPR gene editing. One achievement that has been predicted to happen in the next few years is the building of a completely artificial life form and recent developments have taken a large step in making that prediction come true.

Will the 21st Century be Biology’s turn? (Credit: English-Online)

The work began in 2016 at the J. Craig Venter Institute in San Diego, California where a team of biochemists led by Craig Venter succeeded in taking cells of the simple bacteria Mycoplasma and completely removing the cell’s genome. The researchers then inserted an artificially constructed DNA strand into the bacteria that contained only the 473 key genes that they felt were necessary for life. As a comparison the well-known bacteria Escherichia coli has about 4,000 genes.

Let’s be honest, people have been playing god since we first learned how to control fire! Craig Vinter is just the latest in a long line of scientists who narrow minded people like to criticize. (Credit: SlideShare)

The resulting part natural – part artificial, ‘minimum cell’ was designated JCVI-syn3.0 and when the cells were placed in a petri dish with the proper nutrients the bacteria not only survived but grew and multiplied, forming colonies that appeared like any natural kind of bacteria. This result was heralded for giving scientists a clue as to what the earliest, and therefore simplest forms of life may have looked like. At the same time it was hoped that JCVI-syn3.0 could serve as a basic platform for the development of other cells that could be designed to manufacture valuable biochemical substances like insulin or penicillin or some as yet unknown drug.

The process of creating JCVI-syn3.0 the first minimal cell. (Credit: Science)

Upon closer inspection however the daughter cells produced by the original JCVI-syn3.0 cells were malformed and of varying sizes. Something was wrong with the way the cell walls were splitting during reproduction. The colonies of bacteria may have looked fine but microscopically there was a problem.

At this point the Cellular Engineering Group at the National Institute of Standards and Technology (NIST) began investigating JCVI-syn3.0 under the leadership of Elizabeth Strychalski.  The NIST team reinserted genes, one at a time back into the synthetic organism until the bacteria was producing daughter cells both looked and behaved more like the parent cell. In the end they found that 492 genes were required for a true ‘minimal cell’ which they have christened JCVI-syn3A.

The version of a minimal cell developed at NIST is capable of reproducing in a more normal fashion. (Credit: SciTechDaily)

This is itself a tremendous breakthrough; scientists have now determined the fewest number of genes, the smallest amount of inherited information that is needed in order for a living organism to exist and reproduce. Those scientists who are studying the processes by which the primordial soup in the early Earth became alive now have a goal to work towards. If they can figure out how something like JCVI-syn3A came into being then they will have succeeded in explaining how life began on Earth.

The Miller-Urey experiment gave us step one, a lot of work has been done since then on step two and now JCVI-syn3A has shown us what step four has to look like. How long before we have a clear idea of the way life itself began? (Credit: CK-12)

At the same time those researchers who are looking into using microorganisms in large scale manufacturing of drugs or other complex biochemicals now have a test bed to employ in their research. By inserting only those genes into JCVI-syn3A that are needed to enable the organism to produce the desired drug the scientists will possess a bacteria whose only function other than reproduction is to manufacture the chemical we have designed it for.

Many of the drugs we already use, like penicillin come from simpler forms of life. Soon however we will be designed simple cells to manufacture exactly what we want. (Credit: www.nlm.nih.gov)

Now it is true that JCVI-syn3A may not be a totally artificial life form but it is certainly a big step in that direction, and remember the ‘Biology Century’ is only one fifth completed. Who knows what kind of discoveries biologists and biochemists will be making in the next eighty years!

Movie Review: Godzilla versus Kong.

When I was a kid I have to admit I dragged my dad to some pretty rotten movies. Anything with a dinosaur or something that resembled a dinosaur I had to see. It’s a measure of how bad some of those movies were that 1962’s ‘King Kong versus Godzilla’ was by no means the worse. In fact I think my dad was kinda looking forward to that one because he mentioned several times how much he had enjoyed seeing the original ‘King Kong’ when he was a kid.

Yes it was as bad as it looked. But at age eight, 1962’s King Kong versus Godzilla was a must see for me. (Credit: Rotten Tomatoes)
The original King Kong from 1933 remains a classic however! (Credit: Britannica)

At one time or another I’ve seen every Godzilla movie, even the really bad 70s ones like Godzilla versus Megalon, and every Kong movie including Dino de Laurentiis’s 1976 redo of ‘King Kong’. It’s worth pointing out that de Laurentiis’s Kong cost more than then times as much as ‘Godzilla versus Megalon’ but stank just as bad.

In 1976 Dino de Laurentiis promised that there would be no guy in a monkey suit for his version of King Kong but what we got was a guy in a monkey suit!!!!! (Credit: Deadly Movies)

So as you might guess the new Warner Brothers release ‘Godzilla versus Kong’ was a must see for me, Covid-19 or no Covid-19. O’k I’ll be honest, we signed up for HBO-Max in order to see it in our home. Still, I did get to see it!

The two titans meet once again. Official poster for Godzilla versus Kong. (Credit: YouTube)

Now let’s get one thing straight from the start, nobody goes to see a monster movie because they like good acting or a well thought out plot. You go to see huge creatures demolishing entire cities and wiping out whole armies. That used to mean guys in rubber monster suits stepping on toy tanks and swatting toy planes out of the air while smashing miniature buildings but today it’s all done with CGI. That makes no difference however; a monster movie is all about monsters being monstrous.

I gotta admit, fighting on the deck of an aircraft carrier was a neat idea! (Credit: The Conversation)

In that respect ‘Godzilla versus Kong’ delivers. In addition to two big fights between the title characters there are several flights with lesser monsters all leading up to a big finale where the two good monsters, of course both Kong and Godzilla are really good guys, take on the real bad guy. I’ll leave it at that, no spoilers here.

As in most monster movies the plot that the human actors are following is all just to set up for the big fights and again ‘Godzilla versus Kong is no exception. The two plots, it’s actually difficult to determine which is the main plot and which is subplot, are both silly and contrived but they do successfully integrate at the climax to bring the main monsters together for the big fight. The actors are not expected to display any real depth of emotion in their acting and for the most part live up to that expectation. 

It’s a measure of how unimportant the humans are in Godzilla versus Kong that this was the only picture I could find with any of ‘the stars’ in it! (Credit: YouTube)

The effects, and really a monster movie is all about the effects, are quite good but honestly I think we’ve reached a point where CGI just isn’t going to get dramatically better. The CGI in “Godzilla versus Kong’ is no better or worse than in ‘Avengers: Endgame.’ Like any superhero or sci-fi movie the end credits of ‘Godzilla versus Kong’ list an army of computer artists who produced most of what you see in the movie but I really don’t think that adding any more artists, or any more computing power, is going to significantly improve the product. It looks to me like CGI has hit the law of diminishing returns.

CGI turning actor Andy Serkis into a Chimpanzee. It’s hard to imagine CGI getting much better than this. (Credit: The Indian Express)

You may have heard that Warner Brothers is hoping to turn their monsters, known in Japan as Kaiju, into a cinematic universe to compete with Marvel’s superhero MCU. This universe began with 2014’s “Godzilla’ before going on to 2017’s “Kong of Skull Island’ and 2019’s ‘Godzilla, King of the Monsters’ but I don’t know how much further this monsterverse, or would that be Godizillaverse, can go. After three Godzilla and two Kong movies they need some other monster to step up for a change of pace but let’s be honest there’s no other monster who can carry a movie by themselves. Don’t get me started on Rodan. If either Godzilla or Kong has to appear in every movie I have to ask how many more they can do?

Rodan from his 1965 film debut. Really, he’ll never be more than a monster sidekick! (Credit: Villains Wiki)

At the risk of being presumptuous I do have a suggestion. If Warner Brothers could obtain the movie rights to the works of H. P. Lovecraft then they could do a film version of ‘The Call of Cthulhu’. The follow up to that would then be ‘Godzilla versus Cthulhu’, integrating Lovecraft’s ‘Ye Olde Ones’ into the Japanese Kaiju creatures. Sounds good to me!

Godzilla versus Cthulhu, you heard it here first folks. And it will probably be the last time you’ll ever hear it! (Credit: The Daily Grail)

Still I’ve no doubt that it won’t be long before there’s another Godzilla movie. After all the big green guy first premiered back in 1954 as the Japanese film ‘Gojira’ and ‘Godzilla versus Kong’ is his 36th feature film. And when there another Godzilla movie you can be certain I’ll be there to see it.

Mathematicians have been in love with Prime Numbers for almost three thousand years. Today they are even defining new classes of primes just to have the fun of studying them.

 We all remember Prime Numbers from our high school math classes. You know, those numbers that can only be evenly divided by themselves and one. For example since the number six can be divided into two times three (6=2×3) it is not a prime number. Seven on the other hand cannot be divided by any number except itself and one so seven is a prime number.

The first 12 whole numbers arranged as prime, left side, or composite, right side. While composite numbers can be arranged as rectangles prime numbers can never be arranged as anything but a straight line! (Credit: Wikipedia)

All non-prime numbers are called composite numbers because they can be broken down into their prime factors. For example again 6 can be broken down into 2×3 while 8 can be broken down into 2x2x2 and 36 is 2x2x3x3.

The number two is the only even prime number since by definition an even number is one that can be divided by two! Also while there are a lot of primes down close to zero; one, two, three, five, seven and eleven for example are all primes, as the numbers get larger the distance between primes gets bigger. For example there are five prime numbers between 1 and 10: 1, 2, 3, 5, and 7. However there are only three prime numbers between 80 and 100: 83, 89 and 97.

One age old technique for finding the prime numbers less than, say 100 is to eliminate the multiples of 2, then eliminate multiples of 3, you’ve already eliminated 4 so move on to multiples of five. Keep doing this for all numbers that you haven’t eliminated and at the end you’re left with only prime numbers. This technique is called the sieve. (Credit: Computer Hope)

Nevertheless it is easy to prove that there are an infinite number of primes, so easy in fact that I’m going to do it right now:

We start by assuming the opposite, that there are only a finite number of primes, N, and prove that assumption doesn’t work. So, if there are a finite number of primes we can designate them as p1, p2, p3…all the way out to pN the last prime. If we have all of the prime numbers we can then multiply all of them to get:

MP=(p1xp2xp3x…pN)

If we now add one we get:

MP+1=(p1xp2xp3x…pN)+1

If we try to divide this number by any of our primes, say p15 we will get a remainder of 1/p15. MP+1 is not evenly divisible by any of our primes! That is only possible if it is itself a prime or if it is composed of primes not in the set we said was complete. Either of these two possibilities breaks our assumption so we have proven that it is not possible even in theory to collect a set of all prime numbers, they must be infinite in number! This proof that there are an infinite number of primes goes all the way back to the Greek mathematician Euclid, often called the father of geometry.

Euclid’s ‘Elements’ are still the basis for the mathematics of geometry and are one of the greatest achievements in the history of mankind. (Credit: Biography Online)

Mathematicians have tried for centuries to see if they could derive a formula that will always give them prime numbers. Many such equations work for a while but to date every one that’s been tried has failed eventually. The one below works for integers up to 79 but fails at 80.

N2-79+1601= Prime Number for N a positive integer < 80.

Another interesting, possible technique for finding primes is called the Prime Numbers Cross discovered by German chemist Peter Plichta where when numbers are arranged in progressive circles of 24 numbers per circle the primes occur on 8 spokes radiating out from the center, but not all numbers on those spokes are prime. (Credit: Beyond the Standard Model Pub)

Another interest thing about primes is that they have a habit of coming in pairs, two odd numbers in a row who both turn out to be prime. There are six such pairs less than 100: 11 and 13, 17 and 19, 29 and 31, 41 and 43, 59 and 61 and 71 and 73. The number of these pairs has recently been proven to be infinite as well but I won’t go into the proof both because it’s too long and because I don’t understand it!

Twin Primes are adjacent odd numbers both of whom are prime. It is known that these twins occur more often than would occur randomly but what, if any significance twin primes have is unknown. But they’re just cool! (Credit: Twitter)

Mathematician love to find new properties of primes that they can study and calculate, and the latest news is about a certain kind of prime that has been christened a ‘digitally delicate prime’. Simply put, digitally delicate primes are multi-digited prime numbers that if you change any one of their digits to any other number the resulting number is no longer prime.

Take the number 294,001, which it turns out is the smallest of all digitally delicate primes. This number is prime but if you change any of it’s six digits to any other number, change the 4 to a 6 for example, and the number you get, 296,001, is no longer prime. Now 294,001 has 6 digits, any one of which can be changed to any of 9 other numbers, the 2 say could be changed to 0 or 1 or 3, 4, 5, 6, 7, 8 or 9! That’s 6×9=54 other numbers, none of which are prime, so you can see that just checking to be certain if a prime is digitally delicate or not can be a lot of work.

Delicate primes were first introduced back in 1978 by mathematicians Murray Klamkin and Paul Erdős.  Erdős in fact not only found a few examples of digitally delicate primes but also proved once again that there are an infinite number of digitally delicate primes.

Why doesn’t the Math Olympics get the media coverage the athletic ones do? Murray Klamkin is well known for the problems he developed for the math games. (Credit: Ebay)

The latest development comes from a mathematician at the University of South Carolina named Michael Filaseta who has described a new class that he calls ‘widely digitally delicate primes’. To get a widely digitally delicate prime you take a digitally delicate prime and add a bunch of zeros out front, taking 294,001 and making it 000,000,294001 for example. Remember from high school if you add a zero in front of a number you don’t really change the number, 09 is still just 9 and 000,000,294,001 is still just 294,001.

Doctor Filaseta wearing the first dozen or so digitally delicate primes. He can’t wear any widely digitally delicate primes because, despite having proven they exist he hasn’t found one yet! (Credit: Quanta Magazine)

But what if you change one of those zeros out front to another number, is 000,000,294,001 still a digitally delicate prime like 294,001 is? No, in fact 010,294,001 is not a prime number so 294,001 may be digitally delicate but it is not widely digitally delicate. Doctor Filaseta has actually not yet succeeded in finding a widely digitally delicate prime, but get this, he has managed to nevertheless prove that one exists somewhere.

If you were thinking right now, what practical applications does any of this arithmetic have, why would anyone bother doing all these calculations? Well for centuries people thought the same thing about prime numbers in general. It’s only in the age of high-speed computers and computer hackers that very large prime numbers have found a use as a means of securing sensitive Internet communications.

On the whole I agree with Sir Arthur. But, as I know he’d agree, physicists wouldn’t be able to get very far without all those mathematical tools the idol worshipers have generated. (Credit: Today in Science History)

But more importantly studying number theory in general advances our knowledge of mathematics and in a very real sense our ability to understand the Universe in which we live depends on our understanding of mathematics. That’s why math is often called the ‘Queen of the Sciences’.

Geologists studying newly discovered structures deep within the Earth’s mantel and core are now considering the possibility that they are the remains of an ancient, alien world buried deep within our own.

Before the Apollo astronauts reached the Moon and succeeded in bringing back a few hundred kilograms of Lunar rocks to be studied here on Earth scientists had proposed two basic concepts as to how the Earth-Moon system ever came into being. The first idea was that the Moon had originally been a part of the Earth. Back when our planet was still forming and was a molten mass of rock it got a little too big and was spinning a little too fast which caused a big chunk to spin off and eventually become the Moon.

Just a few of the Lunar samples brought back by Apollo 11. These and the other rocks collected by the astronauts represented the first opportunity for Earth scientists to actually study material from another world! (Credit: KTLA)
An old idea for the Moon’s origin is that it split off from the early Earth like a daughter cell. Some people even suggested that the place where the split occurred gave rise to the pacific ocean. (Credit: Google Sites)

The other idea couldn’t have been more different. In this theory the Moon was never a part of the Earth, it originally came from somewhere else in the solar system, maybe the asteroid belt. Sent on a wandering path by Jupiter’s gravity or some other cause the Moon eventually came too close to the Earth and got captured by our planet’s gravity.

In the capture theory the Moon was never a part of the Earth. (Credit: Two Flags)

The two theories were so different that geologists thought that once they had some actual Moon rocks to examine they’d certainly be able to choose which theory was correct. It didn’t work out that way because the Lunar rocks brought back by the astronauts looked somewhat like Earth rocks but also like something else. After several years of study a new theory started to form, a more dynamic, even violent scenario for the Moon’s birth.

It works like this, about 4.5 billion years ago the Solar System was just beginning to settle down. The proto-Earth, alone with no Moon, was still a molten mass just starting to cool when another planetoid about the mass of Mars came wandering into our orbit from somewhere else in the Solar System. The collision that resulted between the two bodies must have been cataclysmic and resulted in the Earth absorbing some of the planetoid’s mass while some of the fragments of both bodies coalesced into the Moon. The now destroyed planetoid has even been given the name Theia and the entire concept has come to be known as the Planetary Impact Theory.

In the planetary Impact theory another planetoid named Theia smashes into the early Earth and the debris coalesces into our Moon. (Credit: Discover Magazine)

After the collision the Moon soon cooled into the dead world we see today so that the Lunar rocks can still exhibit some traces of its origin as two bodies. The Earth however is a much more active body, with moving tectonic plates, a liquid core and volcanism to say nothing of the erosive forces of wind and rain. The dynamic forces of geology have built tremendous mountain ranges that have then been washed into the oceans to form sedimentary rocks, an entire class of rock completely unknown on the Moon. Surely any trace of Theia on our planet would have long ago disappeared because of all the changes on Earth over the last 4 billion years.

Or maybe not! Back in my post of 24 June 2020, I discussed how geologists had discovered regions of denser, heavier material deep within the Earth’s mantel. Doyeon Kim, the University of Maryland scientist who led the research found these anomalies by analyzing the vibrations caused by large earthquakes as they passed through the inner regions of the core and mantel. Because these anomalous regions were made of hotter, denser material the seismic vibrations passed through them with a lower velocity and so Doctor Kim christened them Ultra-Low Velocity Zones or (ULVZs). Two of these regions, each hundreds of kilometers deep and thousands across, are known to exist, one beneath West Africa and the other beneath the Hawaiian Islands in the Pacific.

By studying the transmission of Earthquake vibrations as they pass through our planet’s center Dr. Kim was able to discover previously unknown structures deep with the Earth. (Credit: EurekAlert)

Now geologists at Arizona State University led by Ph.D. candidate Qian Yuan have proposed that these huge masses are actually fragments of the planetoid Theia that have managed to remain intact deep inside the Earth for more than four billion years. A paper detailing their hypothesis has been presented at the 52nd Lunar and Planetary Science Conference in March of 2021.

As evidence for their theory the geologists point to not only the ULVZs difference in density but also to certain chemical signatures indicating that the material making up the ULVZs is at least as primitive as the Theia impact. Qian Yuan and his colleagues are now preparing a formal paper to be submitted to the journal Geophysical Research Letters. 

Are the large structures deep within the Earth all that remains of the planet Theia? (Credit: World Today News)

Think of it, NASA and other space agencies are spending billions of dollars to send probes millions of kilometers in order to study alien worlds when there may be immense pieces of another planet just a couple of thousand kilometers beneath out feet. Of course the problem is that’s a couple of thousand kilometers of solid rock you have to get through in order to obtain any samples.

Archaeology news for April 2021.

There have been several exciting discoveries from ancient sites around the world. So rather than wasting any time let’s just get to it.

I’ll start today with the discovery that’s gotten the greatest amount of press coverage, the unearthing of new fragments of the Dead Sea Scrolls. Now everybody knows that the Dead Sea Scrolls are fragments of writings from the Jewish Scriptures, the Christian Olde Testament that have been dated from about the second century BCE to the end of the first century CE. The writings were discovered between the years 1947 and 1956 in a series of eleven caves not far from the shoreline of the Dead Sea in the Khirbet Qumran region of Israel. The writings consist entirely of Jewish religious texts and while most are versions of well-known books from the Olde Testament some of the texts are of works that were completely unknown before their discovery.

A few of the caves where the Dead Sea Scrolls were found. They look like pretty good hiding places to me and the fact that the area is so dry helped to preserve the scrolls! (Credit: Wikipedia)

No one knows exactly who wrote the Dead Sea Scrolls nor how they came to be hidden away in deserted caves so far from any habitation. One of the two main theories is that a small religious sect known from the works of the Jewish historian Josephus as the Essenes wrote the manuscripts at a nearby archaeological site. The problem is that there is no evidence to connect the small settlement to either the scrolls or the Essenes. The other theory is that before the Romans captured the city of Jerusalem and ended a Jewish revolt in 70 CE a group of Jewish patriots managed to escape with a part of the Temple library that they hid in the caves to keep them from being destroyed by the Romans. Again the evidence for this theory is only circumstantial.

Ruins of the nearby settlement dated to the time the scrolls were placed in the caves. Nevertheless there is no evidence connecting these remains to either the scrolls nor the religious group known as the Essenes. (Credit: Sonia Halliday Photo Library)

Every since the discovery of the writings seventy years ago the caves along the Dead Sea have been explored and studied by archaeologists in their desire to not only solve the riddle of who put the scrolls there but also in the hope of finding some more fragments. And in fact the Israel Antiquities Authority has recently announced the discovery of dozens of new fragments that when pieced together were found to come from the books of Zechariah and Nahum in the so-called minor prophets of Jewish scripture.

Some of the better preserved fragments of the Dead Sea Scrolls. (Credit: BBC)

The fragments were found in a cave colourfully named the cave of horrors, not because of any grisly find that had been made there but because of the difficulty of reaching the site. Really, at 80m from the cliff top and at the intersection of two ravines the cave is so hard to reach with modern rappelling equipment that it’s difficult to imagine how first century Jewish patriots fleeing the Romans managed to ever reach the cave’s entrance.

The scroll fragments discovered in the past year however are mostly just tiny pieces that have to be assembled like the pieces of a jigsaw puzzle. (Credit: NBC Los Angeles)

Although the latest writings are plainly fragments of Jewish scripture the language they are written in is Greek showing how important that language was in the Middle East at that time. (In fact did you know that all quotations from the Olde Testament that occur in the New Testament are from a Greek translation of the Jewish scriptures known as the Septuagint.) Also, even though only a few lines of text are able to be reconstructed there are noticeable differences in wording between the new fragments and the same lines as printed in your bible.

The Septuagint is a 1st Century BCE Greek translation of the Olde Testament which is the source of the quotations that appear in the New Testament. (Credit: YouTube)

As hard as it can be to interpret writings from thousands of years ago most archaeological sites contain no writing, making it infinitely more difficult to understand exactly what happened there. A 6,200-year-old Neolithic site that has been unearthed near the town of Potocani in what is now the country of Croatia is a prime example of this.

Discovered in 2007 the site is simply a mass grave, the remains of 41 people, men, women and children aged from about 2 to 50 years old were crammed into a pit only 2 meters in diameter and one meter deep. This was not a quick burial for the victims of some plague however, nearly every skull examined by archaeologists from the University of Zagreb showed at least one blunt force wound at the back of the head. Just as telling, there were no sign of defensive wounds anywhere on the arms or body. These people either did not, or could not fight back against their attackers. The dead in the pit were all murder victims.

The Potocani massacre pit. That’s a lot of bodies stuffed into such a small grave. (Credit: National Geographic)

At first the scientists thought that they might have stumbled upon a massacre from the 20th century, a Nazi execution from WW2 or ethnic cleansing during the breakup of Yugoslavia. The lack of any metal objects like belt buckles or buttons made that seem unlikely however. It was only after carbon 14 dating that the archaeologists realized just how long ago the massacre had occurred.

Examples of the injuries sustained by the victims of the Potocani massacre. (Credit: Live Science)

In order to gain some clue as to why these 41 people had been killed it was decided carry out DNA analysis of the remains. Surprisingly it turned out that while the victims were related to a degree, they were not closely related, in other words they were not all members of the same family. So this atrocity was not a family or clan being wiped out by a rival family or clan. As far as the evidence showed this was a random sample of people living in the area 6,200 years ago who were murdered for some unknown reason.

Evidence from the stone age that our ancestors were already fighting wars is not hard to find! (Credit: Weapons Universe)
And we also know that Otzi the Iceman, discovered frozen in the Alps in 1991, was actually a murder victim from the copper age. The Italian police actually have a file on this case making Otzi the coldest of cold cases. (Credit: Pinterest)

We probably will never know the exact motive for these killings but the researchers speculate that climate change, a long period of either drought or flooding may have led to a squabble over limited resources and these victims were simply the losers of that conflict. In other words the events of 6,200 years ago may not have been all that different from the ideological killings of the 20th century.

For my final story I’d like to just mention a somewhat less violent, more pleasant story. Greek archaeologists working near the ancient city of Olympia, site of the Olympic games in ancient times, have unearthed a 2,500-year-old bronze idol in the shape of a bull. The small statue was found quite by chance, as an observant archaeologist happened to notice one of the horns sticking out of the ground after a heavy rainfall.

Small statue of a Bull discovered at Olympia. (Credit: ABC News)

The researchers believe that the figurine was probably an offering to the god Zeus not only because of the nearby temple to the chief of the gods but also because the bull was a well known sacred symbol of Zeus, the story of the rape of Europa where Zeus disguised himself as a bull comes to mind.

The rape of Europa by Francesco Albani. Zeus is disguised as the bull and this legend gave the continent of Europe it name! (Credit: Artnet)

The figurine has been taken to a labouratory for preservation, as have the fragments of the Dead Sea Scrolls and the remains of the Croatian dead. There they will be studied in the hope that some clue or clues may be discovered to help archaeologists tell us more of the stories of our ancestors.

Is Warp Drive just a dream of Science Fiction? Some theoretical Physicists think it might actually be possible. Set Course Mister Sulu, ahead Warp Factor Two!

Just a few weeks ago I published a post about how several physicists at the Central Astronomical Observatory Pulkovo in Saint Petersburg Russia had published a paper discussing how astronomers might be able to actually discover the existence of wormholes in space. See my post of 10 March 2021. Basically wormholes are shortcuts in higher dimensions that could allow a space traveler to go from one part of the Universe to another faster than a beam of light could in normal, three dimensional space. By using a wormhole you’re not breaking the law against going faster than light, you’re circumventing it!

A wormhole connects two distant regions of normal space by a shortcut through higher dimensions! (Credit: Science News)

Well now physicists Alexey Bobrick and Gianni Martire at Applied Physics have published a paper in the journal Classical and Quantum Gravity that proposes what they consider to be a ‘realistic’ approach to building a warp drive engine that would enable a starship to effectively travel faster than light. Now Bobrick and Martire were not starting from scratch, their work is based upon an idea for using Einstein’s gravitational field equations to warp space first developed by physicist Miguel Alcubierre and which has become known as the Alcubierre drive.

Physicist Miguel Alcubierre originator of a solution to Einstein’s equations that would warp space. (Credit: Facebook)

It was back in 1994 that Alcubierre first published his metric tensor that described a region of space generated around an object, a starship. What the tensor would do would be to contract space to one side of the starship while expanding it to the other. The starship itself would remain inside a ‘bubble’ of flat space while the bubble would then ride the contraction – expansion wave in much the same way as a surfboard rides an ocean wave, the starship inside would be like the surfer. Inside the bubble of flat space everything would behave as in normal space, nothing would move faster than light, it’s the entire bubble, an entire region of space-time that is moving faster than light.

Alcubierre’s metric tensor that allows warping of space around a starship which is traveling in the x direction. (Credit: Wikipedia)
The starship Enterprise, appropriately enough, in warp space. Space-Time in front of the ship is squeezed in tight while space-time in back is stretched out. The ship itself is inside a bubble of local normal space-time! (Credit: Quora)

As you might guess there are some practical problems. The three biggest are number one, in order to generate the warp you need quite a lot of ‘negative energy’. What’s negative energy? Well it’s some type of energy or matter that exhibits a negative gravitational field. The only kind of negative energy we have any idea about at present is the ‘dark energy’ that astronomers believe is causing the expansion of the Universe to increase. In other words, we know next to nothing about negative energy and the idea of using it in a generator is pure speculation at present.

The second problem is that when Alcubierre calculated the amount of negative matter needed to generate a bubble big enough to hold a reasonably sized starship, say 100m or so, he found that it would be greater than the amount of normal matter in the entire known Universe. And if all that wasn’t enough the use of negative energy would allow the formation of closed time-like curves that could be used to travel backward in time, see my post of 17 November 2020.

Closed Time-Like Loops can be generated by massive objects moving close to, but not more than the speed of light and can allow time travel to the past! (Credit: Google Sites)

Needless to say a lot of other physicists have voiced their opinion about the whole concept of the Alcubierre drive, both for and against. The work of Bobrick and Martire is just the latest. In their paper they show how, instead of requiring negative energy an Alcubierre bubble could be generated with a strong gravitational field from normal matter. As you might guess the strength of that field is pretty much that of a black hole. So if you want to get somewhere faster than light can, all you need is a black hole!

If you happen to have a black hole handy you too can build a warp drive generator! (Credit: The Conversation)

Perhaps the biggest problem with the Alcubierre drive along with wormholes and all the other kinds of other weird solutions to Einstein’s equations of General Relativity is that they don’t work with Quantum Mechanics. You see for over a century now we’ve had these two wonderful theories, General Relativity that describes the very large, and Quantum Mechanics that describes the very small and they not only don’t work together they don’t even follow the same mathematical formalism.

Just a few of the problems in trying to solve the puzzle of Quantum Gravity. (Credit: ResearchGate)

The majority of physicists today are of the opinion that when a theory of Quantum Gravity is finally found weird solutions like Alcubierre’s drive or wormholes will simply turn out to be invalid, like faster than light travel is in relativity. Of course it is quite possible that quantum gravity could actually point us in the direction of realistic faster than light travel. So let’s be glad that some of the more daring theorists out there are trying to see how far they can stretch Relativity and Quantum Mechanics.

Scotty I need warp drive now! (Credit: NextBigFutureNow.com)

After all, as the Sci-Fi writer Arthur C. Clarke liked to say. “The only way to find the limits of the possible is to go beyond them to the impossible!”

Scientists are making great strides in the development of lab-grown or cultured meat.

The idea behind lab-grown or cultured meat is actually quite simple. First you extract a few cells from a tasty region of an animal’s body, let’s say the prime rib area of a cow or a chicken’s breast. Just a few cells, not enough to harm the animal. Then you grow those cells in the lab, billions of them, enough to make them into beefsteaks and chicken breasts or other cuts of meat that you can then sell as food to your customers.

It won’t be long now before this image becomes real! Look for it in your Supermarket tomorrow! (Credit: Food Navigator)

There are several advantages to producing meat in the lab. First of all you don’t have to waste energy and materials producing the non-eatable parts of the animal, like bones and skin. In fact you don’t even have to produce the less popular cuts of meat like the brains or intestines. Then there’s hygiene and quality control. Meat produced in the lab is less likely to be infected with bacteria or absorb toxic chemicals like mercury from the environment.

It all seems so clean and anti-septic, and no animals were harmed in the production of this burger. (Credit: SGS)

Then there’s the morality aspect. Cultured meat doesn’t require the death, or indeed any real harm to the animal who supplied the original small number of cells that started the whole process. In today’s world there are many people who are concerned about the welfare of the animals we raise and slaughter to feed ourselves. Lab grown meat would require far fewer animals, who would probably be given far better living conditions in order that they produce the best possible cells, and aside from an occasional biopsy to procure some of those cells they would never be harmed. In other words ethical treatment of animals! 

Certainly being a vegetarian is more complicated than being a carnivore, and besides I never met a sausage I didn’t like! (Credit: Signature Market)

Sounds crazy but it’s actually been done. In my post of 7 April 2018 I reported on the first ever cooking of a hamburger made from lab grown meat back in 2013. Those few reporters who were granted a taste of that burger pronounced it to be tasty, but rather dry and a bit too tough.

Dr. Mark Post with his creation, the first lab grown hamburger patty. (Credit: The Guardian)

That’s been the trouble so far, texture and juiciness. You see the meat we buy in a supermarket, the meat that comes from a once-living animal, is more than just muscle cells. There are also fat cells as well and not only is the ratio of muscle to fat cells important to get a nice juicy meat but the two distinct kinds of cells have to be ‘assembled’ in a way that mimics the texture of naturally produced meat.

A pair of researchers at McMaster University in Canada’s Department of Biomedical Engineering have been working on that problem. Starting with a technique that produces thin sheets of living tissue in a nutrient solution for human transplants (See my post of 16 May 2020) Ravi Selvaganapathy and Alireza Shahin-Shamsabadi succeeded in stacking those sheets of muscle and fat cells. Each of those sheets has a thickness about that of a sheet of printer paper and when stacked together the cells would begin to bond to each other spontaneously.

Dr. Shahin-Shamsabadi working in his lab. (Credit: CBC)

The initial experiments were carried out with cells gathered from labouratory mice but the researchers decided not to sample their ‘mouse steak’. Instead Selvaganapathy and Shahin-Shamsabadi performed a second experiment with rabbit cells with a result that Selvaganapathy proclaimed. “It felt and tasted just like meat.”

A spoonful of mouse meat, hummmm…tasty! (Credit: CBC)

One advantage of Selvaganapathy and Shahin-Shamsabadi’s technique is that the muscle / fat ratio can be varied quite precisely to match the desires of potential customers. The researchers are convinced that their technique will work equally as well for a range of other meats, beef, pork and chicken being obvious choices. Personally I’m curious as to whether the technique would work as well for fish, like a nice salmon or tuna fillet.

Lab grown fish could help to eliminate the overfishing of many endangered species. (Credit: Los Angeles Magazine)

Selvaganapathy and Shahin-Shamsabadi are now hoping to increase the scale of production. They’ve formed a start-up company to explore the commercial possibilities of their process. They certainly have a good marketing slogan that they can use. “Real Meat built to Order.” They may have to get used to some competition however, there are at least 38 different companies seeking to gain a foothold in what could soon be a very profitable industry.

Lab grown meat companies, right side of chart, also have competitors in plant and fungi derived meat alternatives, left side. (Credit: Meduim)

Food production in general is poised to undergo a revolution during the 21st century. Whether it be aquaculture or urban farming or cultured meat the way we produce our food in thirty to fifty years from now is going to look nothing like the farms and ranches where food has been grown for the past ten thousand years. It has to change because those old ways of agriculture are unsustainable in a world of eight billion or more human beings.

Paleontologists are still debating both when and why our ancestors became fully bipedal. A new study of a fossil from Ethiopia may help to answer these critical questions.

Everyone knows that very few animals walk on only two legs or more technically, are bipedal. It’s true that some creatures, like a bear may rear up onto their hind legs in order to grab some fruit from a tree or to get a better look at their surroundings like a prairie dog. Such species don’t walk very far however and are glad to get back down onto all fours. Then there are some animals like the kangaroo or a Tyrannosaurus rex who walk all the time on two legs but have a have a nice big tail to give them balance.

Some animals, like this Grizzly Bear, are capable of standing on two legs for a short period of time and even taking a few clumsy steps but really they’d rather be down on all fours! (Credit: Reddit)

Our close relatives the great apes often walk on two legs when they are carrying food or perhaps a child but even they prefer to knuckle walk, gaining some balance and propulsion from their forelegs. Only humans walk fully upright, on two legs with no tail. In fact paleontologists have created a special name for those species of ape who walked fully upright, they are called hominids and consist of two geneses, our own genus Homo and our extinct relatives the Australopithecines.

This famous illustration of human evolution shows upright posture and brain size evolving in parallel. Actually our ancestors were fully upright before our brains got much bigger than a chimpanzee’s. (Credit: History.com)

When and why did our hominid ancestors evolve such an unusual way of getting about? There’s good fossil evidence that our ancestors were primarily bipedal going back at least 3.5 million years ago (MYA). The leg and arm bones of the famous fossil ‘Lucy’ discovered in the 1970s show that her species, Australopithecus afarensis, was fully bipedal that long ago. So somewhere between 3.5 million years ago when A afarensis lived and about 7 million years ago when our ancestors broke away from the ancestors of the Chimpanzees is when we became fully upright. Exactly when is still a matter of debate.

Australopithecus afarensis, our ancestor of about 3-3.5 million years ago. In many ways A afarensis was more like a chimpanzee than a modern human, but they walked fully upright! (Credit: Science Photo Library)

Why our ancestors became bipedal is even more hotly contested. Charles Darwin, who correctly pointed out that chimps and gorillas were our closest living relatives, suggested that our ancestors became more and more bipedal as we used our hands more to carry things or use tools. Later evolutionists have theorized that as our ancestors moved out of the African forest into the savanna the ability to see above the tall grass may have been the cause. Another possibility that has received some support is that a fully upright posture would reduce the amount of skin that is exposed to the harmful effects of sunlight, remember this is also the same period of time where our ancestors were losing a large part of their body hair.

Homo habilis making a stone tool. Did our ancestors become bipedal in order to better use their hands for toll making or did they make more tools because they were bipedal? (Credit: MutualArt)
Either way they made a lot of tools! (Credit: Live Science)

With so much controversy any piece of additional evidence becomes even more important. That’s why a new study by a team of anthropologists with lead author Thomas C. Prang of the Department of Anthropology at Texas A&M University and published in the journal Science Advances of a 4.4 million year old partial skeleton has gathered attention. The fossil belongs to a species called Ardipithecus ramidus or simply ‘Ardi’ for short. Ardi may be only a partial skeleton, too poorly preserved to tell if it was fully bipedal or not, however it does date from the critical time between our last common ancestor with chimps and A afarensis. More importantly Ardi’s left hand is exceptionally well preserved. This allowed the team of researchers to make a series of morphological comparisons to the hands of our modern knuckle walking relatives, chimps and gorillas as well as modern humans and even our fully upright ancestors like A afarensis.

‘Ardi’, Ardipithecus ramidus skeleton used by Thomas Prang in his study. Notice how well the left hand, the upper hand in the image, is preserved. (Credit: Wikimedia Commons)

What the researchers found was that in a number of key features including the size and shape of individual bones of the hand Ardi was much closer to that of modern apes then that of any hominid, modern or ancient. According to Doctor Prang, “…,we found evidence for a big evolutionary ‘jump’ between the kind of hand represented by Ardi and all later hominin hands, including that of Lucy’s species. This ‘evolutionary jump’ happens at a critical time when hominins are evolving adaptations to a more human-like form of upright walking and the earliest evidence for hominin stone-tool manufacture and stone tool use, such as cut marks on animal fossils, are discovered.” That time frame of somewhere between 4.4 MYA and 3.5 MYA is also crucial because it was during that time that our ancestors lost their opposing big toe so that unlike our cousins the chimps and gorillas we can no longer grasp things with our feet.

One of the techniques used to compare ‘Ardi’s’ hand to those of more modern humans as well as modern apes. (Credit: Thomas C. Prang et al)

If the results of the study hold up to scrutiny that will greatly reduce the time frame during which our ancestor became fully bipedal, from about 3.5 million years to a little less than one million years. Sometime between 4.4 MYA and 3.5 MYA our ancestors took a big step toward becoming human. With an upright posture they could expand their use of primitive tools. Greater tool use would then cause an evolutionary push toward a bigger brain initiating a feedback loop of more intelligence and greater tool use.

The end result of that evolutionary ‘jump’ is our modern, human dominated world. Let’s just hope our brains and tools are sufficient to enable us to stop destroying it.

Every year millions of birds are killed when they fly into illuminated glass windows. The National Audubon Society has established a ‘National Lights Out’ program in an attempt to reduce those deaths.

We usually hear it first, we’ll be sitting in our living room or maybe bedroom at night with the lights on when suddenly there’s a bang against the window. Whether we go out to look at what happened immediately or wait until the next day doesn’t matter, either way we’ll often find a small dead bird lying on the ground beneath the window.

Birds are actually fairly smart animals but understanding the whole concept of a window is a bit beyond their capabilities. (Credit: Twitter)
The end result is often an unnecessary tragedy. (Credit: All about Birds)

It’s easy to understand what happens, of course birds can’t understand what either artificial lights or transparent glass are and so they get confused and fly straight into our window, to deadly effect. And if this tragedy happens once or twice a year for a residential home it happens nightly for those tall office buildings with hundreds of brightly lit windows that remain on all night long.

For a migratory bird passing through, Philadelphia at night is a confusing mass of colours, lights and deadly glass windows. (Credit: Tripsavvy)

There are also certain times of year when the problem becomes even worse because millions of birds that are not regular city dwellers like pigeons or starlings migrate through populated areas resulting in thousands of completely unnecessary deaths. My hometown of Philadelphia lies right along North America’s east coast bird migratory route and last fall the city saw an especially terrible night on the second of October. Because of bad weather combining with a large number of migrants passing through the city an estimated 14,000 birds died in a single night. In fact Philadelphia has a long history of studying such accidental bird kills with the Academy of Natural Sciences preserving specimens of birds who died by crashing into buildings dating back as far as the 1890s.

The United States is crossed by several major bird migratory routes. My hometown of Philadelphia is only one of the big cities the lay along a migratory path. (Credit: Pinterest)

Last year’s high death toll may have had something to do with the decision by civic leaders to add Philadelphia to the growing list of cities that participate in the National Lights Out initiative. National Lights Out is a concerted effort by both naturalists and business leaders to just turn off as many unnecessary lights as possible, especially those in high rise office buildings. Think about it, what use is anybody getting by having all of the lights on in an empty, let’s say accounting firm on the 20th floor of some skyscraper. It’s a waste of energy and money as well as being a danger to innocent birds and all it takes is someone remembering to turn out the lights when they go home for the night.

Part of the carnage the happened on 2 Oct 2020 in Philadelphia. (Credit: Academy of Natural Sciences)
Saving energy, saving money and saving birds! And all it takes is someone remembering to turn out the lights out when they’re not needed! (Credit: Trendsmap)

Now participation is voluntary, our city council is considering a bill to promote the initiative but there’ll be no penalty for those businesses that fail to join in. The effort to convince landlords and tenants to join in is being led by the Delaware Valley Ornithological Club and the Mid-Atlantic chapter of the Audubon Society along with the Academy of Natural Sciences of Drexel University.

Just a few of the organizations leading Philadelphia’s effort. (Credit: Academy of Natural Sciences)

The movement has also gained the support of our local Building Owners and Managers Association (BOMA) and the Building Industry Association of Philadelphia. So far these organizations have succeeded in recruiting some of the biggest businesses in Philadelphia to take part including Comcast Corporation, owner of the two tallest buildings in the city. Also pledging their support are Brandywine Realty the city’s largest landowner as well as more than a dozen other building owners or operators.

Comcast Corporation’s two towers are the tallest buildings east of the Mississippi outside of New York City so Comcast’s cooperation with ‘Philly Lights Out’ is a big deal. (Credit: Visit Philly)

Now Philadelphia is not the only city getting into the National Lights Out effort, in fact we’re actually kinda late in joining in. The first city to take part was Chicago back in the year 1999 and since then New York, Boston, Baltimore, Washington D.C. and some thirty other cities have taken part.

Cities across the country are joining in the effort to save birds, is yours? (Credit: City and County of Denver)

As I mentioned above migration periods are the critical times for the National Lights Out initiative. For most North American cities that means April and May in the spring as the birds fly north and August 15th to November 15th as they fly south. But really at any time of year how much effort does it take to remember to turn out the lights when everybody has gone home for the night? It saves energy, saves money, eliminates some greenhouse gasses as well as saving the lives of some birds. 

And before I go I’m going to add one more reason to turn out the lights, light pollution. I my opinion the night sky is simply beautiful but you can’t see it in a city because of all the glow from artificial lights. Really, on a good clear night you should be able to see about three thousand stars along with a planet or two and the pale wisp of the Milky Way. When I step outside my house here in Philly however I’m lucky to see a couple of dozen stars and forget about any sign of the Milky Way. That’s because of all the streetlights, lights from nearby businesses as well as lights from my neighbor’s homes. I have seen the night sky from a darkened Navy Destroyer in the middle of the Atlantic, from the desert of Arizona more than a hundred kilometers from any town and from the high peaks of the Rockies and I can tell you that the night sky near any big city pales in comparison because of all that light pollution.

Just a little hint of what light pollution can do to the night sky. If you think about it, today there are millions of people who really have no idea what the heavens look like! (Credit: Reddit)
In my opinion the best place to do naked eye astronomy is from the middle of the ocean on a darkened navy ship. I did that from the deck of the USS Damato DD871. (Credit: Facebook)

In fact backyard astronomers like me have even started an initiative of our own, the ‘Dark Skies’ project to turn off or reduce all of the unnecessary artificial lights so that we can enjoy the beautiful natural lights that the Universe has provided us. Who knows, maybe I’ll write a post about that before too long.

Scientists propose a new state of matter, an active form of matter they call the Swirlonic state.

We all remember back in our science classes how scientists classified matter into three basic states, solid, liquid and gas and each of these different states have very different physical properties. Solids for example do not change their shape to fit into their container, in fact solids are the only state of matter that holds its shape without a container, and solids are not at all easy to compress into a smaller volume. Liquids on the other hand flow in order to fit their shape to match that of their container but like a solid liquids are not easily compressible. Finally a gas will fill its container like a fluid but unlike the other states it is comparatively easy to compress or expand the volume of a gas.

The three classic states of matter are solid, liquid and gas but of course reality isn’t quite that simple. (Credit: Gillibrand Primary School)

We were also told that most materials go from one state to another depending on their temperature, water being the classic example with ice, liquid water and steam. Going from a solid to a liquid is of course called melting, the reverse is called freezing while going from a liquid to a gas is either boiling or evapouration, the reverse is called condensation.

Now these classifications are not quite hard and fast, see my post about glass in 23 January 2021. Some materials do have quasi-states where they show characteristics of two or more states at the same time. However, the vast majority of the behaviour of the majority of substances in our everyday lives can be pretty well pigeonholed into solid, liquid or gas.

Quasi states of matter are a hot topic in materials science right now because they have been found to possess a vast number of useful properties. (Credit: Wiley Online Library)

Or can they? In a paper published in the journal Nature mathematicians at the Skolkovo Institute of Science and Technology in Moscow Russia and the Department of Mathematics at the University of Leicester in the UK have described what they consider to be a new state of ‘active matter’ that displays properties greatly different from those of the other three states of matter.

The mathematicians were inspired by the behaviour of schools of fish or flocks of birds but the researchers quickly realized that complex but non-living chemical compounds that react with their surroundings often displayed similar properties. One particular class of complex compounds is known as ‘Janus Particles’ because one side of the particle has different chemical properties than the other.

If we consider the individual fish in a large school to be ‘particles of matter’ then the school itself behaves as a new state of matter! Notice the swirl. (Credit: JSTOR Daily)
Named for the two faced Roman god of entryways, get it you can go in and out, a Janus particle has distinctly different properties on its different sides. (Credit: Semantic Scholar)

Soap is an excellent example of such a Janus particle, see my post of 2May2020. This is because at one end of a soap molecule is a polar structure that will dissolve in water, a property formally known as hydrophilic. At the other end however is a non-polar structure that will dissolve in oil, a property called hydrophobic. Because of these different properties at different ends when a large number of soap molecules are dissolved in water they tend to group themselves in a circular or spherical shell structures with the polar end facing out and a void in the middle, like a soap bubble. The researchers found that such self-assembly into spherical shell configurations were typical of active matter in general and in addition that the shells showed a tendency to rotate or swirl, which prompted the scientists to name their new state Swirlon.

Molecules of soap possess a water loving, hydrophilic side and a water hating, hydrophobic side. This allows them to form a bubble around an oil droplet when dissolved in water. (Credit: AwesomeStories)

The mathematicians developed a computer simulation that allowed them to study the behaviour of their swirlonic matter under a variety of different conditions. What they found was that swirlonic matter displayed many strange behaviours including the ability to self-assemble in a variety of shapes.

Evolution of the swirlonic state. Researchers have found that active particles tend to form themselves into spherical clumps that possess a swirling motion.

The mathematicians are now interfacing with Materials scientists who are working with the types of ‘active matter’ they simulated in order to both confirm their results but also to promote new real world materials with new useful properties. In the future the researchers hope to increase the information processing capabilities of their simulated particles in order to better understand the behaviour of living ‘active particles’ like flocks of birds or swarms of insects.

A flock of birds or a new state of matter. Guess it kinda depends on your point of view. Notice the swirl! (Credit: How it works)

‘Active matter’ is a new class of materials that are now becoming the subject of intensive study, both in the lab and in computer simulations. At the present time we are only beginning to learn how to put their strange properties to useful purposes but several have already shown great promise. New materials with new properties, or in a single word, progress.