Artificial Intelligence Finds Missing Ghost Ancestor of Humans
Our ancestry as a species is intricate and convoluted. We know that Denisovans, Neanderthals, and the other iterations of our hominin ancestors interbred and evolved over hundreds of thousands of years. But while anthropologists have done their best to map out this complicated lineage, we’ve now reached a point in our evolution that machines can map our genealogy better than we can. Such was the case when a machine learning algorithm applied to our DNA roadmap found a new ancestor we didn’t even know existed.
According to a study published in Nature Communications, scientists fed DNA data from fossilized bones and modern humans into an A.I. algorithm that computed thousands of timelines to map out the possible evolutionary pathways based on what we know – or what we think we know – about our ancestors migrations, diasporas, and interbreeding to tell us if we were missing anything.
It turns out we were…
The new study found that a missing, archaic “ghost” ancestor played a significant role in the development of the human species, helping to propel us from primitive hominins to the highly intelligent beings we are today.
This ancestor was likely a hybrid of Neanderthals and the Denisovans – the hominin ancestor discovered in 2010, that five percent of modern humans can still directly trace their genealogy through.
And though the study’s authors are referring to this hominin hybrid as a “ghost” population, they also believe there might be fossil evidence of it found in the bones of a 90,000-year-old specimen of a teenage girl discovered in Siberia’s Denisova cave – the location where the original Denisovan fossils were found.
The discovery of the Denisovans has presented itself as one of the most profound and baffling finds for archeologists within the past decade as their fossil remains showed they existed for millennia alongside our other ancestors. Not to mention they appear to have been massive in comparison to other hominin species.
And by massive, they mean that a Denisovan wisdom tooth found in the cave was originally mistaken for that of a bear’s. And though wisdom teeth can vary in size, the anthropologist studying the specimen, Bence Viola, told National Geographic, “large teeth with massive roots would probably require massive jaws.”
Who were these gigantic Denisovans whom we know so little about, and even more baffling, what did their hybrid progeny with Neanderthal’s look like? These paradigm-shifting discoveries only add to the fact that we still have so much more to learn about our species’ history.
For more on the strange discovery of the gigantic Denisovans check out this episode of Ancient Civilizations :
A New Phase of Matter Appears to Defy Laws of Thermodynamics
Scientists have created a new phase of matter known as time crystals, a quantum phenomenon appearing to defy the laws of thermodynamics. Could this discovery upend our understanding of classical physics?
A team of researchers developing Google’s Sycamore quantum computer announced the successful creation of a time crystal that lasted for 100 seconds. This novel phase of matter appears to defy the second law of thermodynamics, which states that entropy, or chaos and disorder, always increases in an isolated system. In other words, energy must be put into a system in order to maintain structure or motion. But time crystals have been observed to maintain a constant state of flux, without losing any energy.
Dr. Simeon Hein, director of the Institute for Resonance, explains the science behind this strange phenomenon.
“Crystals are in everything we do—they’re in watches—they’re in so many things because they’re regular, they create evenness, they create this consistency. And just like their pattern is very consistent, the energy that crystals transmit turns into a very regular pattern which is why you can use a quartz crystal in a watch,’ Dr. Hein said.
“You can put a noisy electrical signal in but it will come out as a very consistent beat, and that created the idea for some people, in this case, Frank Wilczek from M.I.T. in 2012, to propose the idea that you not only had crystals in space, you could have crystals in time. You could create an oscillating circuit, using specific quantum principles, you could create a very constant quantum beat.”
Time crystals have been described as the first “out-of-equilibrium” phase of matter, meaning they maintain order while in an excited state. But how do time crystals accomplish this, without expending energy?
“At a quantum level, they’re getting energy from something called the Zero-point energy field. The Zero-point energy field is the lowest ground state of quantum matter, but the lowest state doesn’t mean absolute zero like nothing’s happening. The quantum ground state is actually the base state of the universe, where even though there’s nothing happening, the field itself generates energy, causing random fluctuations and particles to pop out of nowhere, and all sorts of really interesting effects that normally, I should say most of the time, we don’t see in our regular, physical reality,” Dr. Hein said.
“So these coherently entangled particles would be deriving their energy from the quantum vacuum field. But if they’re getting their energy from the quantum vacuum, instead of our classical world, you can’t see any reason why they would eventually have to wind down like our regular clocks would, and energy would dissipate.”
With this new discovery of time crystals appearing to defy the second law of thermodynamics, how has mainstream science reacted, or tried to reconcile this paradox?
“A lot of these quantum phenomena seem to defy classical physics, the whole idea of quantum entanglement suggests faster than light interaction or communication, Einstein called it ‘spooky action at a distance,’ and experiments later confirmed that you could take pairs of particles and separate them, and you could do something to one of them, and the other particle would immediately react at farther and farther distances away,” Dr. Hein said.