Artificial Intelligence Finds Missing Ghost Ancestor of Humans

human ancient skull

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 :

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Former Google Exec Says Voodoo Doll Avatars Used For Targeted Ads

One day at work here at Gaia, I went into our break room and was offered some cheddar cheese from a colleague. We had ordered a bag of snack-sized Tillamook sharp cheddar and were enjoying it while having a discussion about our favorite cheeses and whether this particular cheddar was sharp enough for our taste. When I went back to my desk and clicked on an article, I was taken aback (well, not really these days) when I saw a targeted ad for cheddar cheese from a grocery store in my area.

Ok, now I was convinced my phone was eavesdropping on my conversations throughout the day in order to serve me advertisements – a conspiracy that has been debated ad nauseam recently, as more and more people report uncanny instances of astoundingly targeted ads, based not on their search history, but on conversations they have around their devices.

But I got served this ad on my computer, which wasn’t within earshot – so how could it have known? My phone was in my pocket, which is synced to my computer, that must explain it!

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