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The Teeth of the Early Neanderthals' The Lineage Is Older Than Thought | Science



In the cave called 'the pit of bones,' the collection of 430,000-year-old teeth are curiously smaller than might be expected with. Aida Gómez-Robles, an anthropologist at University College London, studies how ancient is a scientist suggesting that the lineages of modern humans and Neanderthals split some 800,000 years ago

hominin species' teeth evolved over the ages. She believes that because of the ancient teeth look too modern for their era, they have to be evolved more often than not. Science Advances

As various homin species evolved, their teeth are changed in non-compliant ways, generally becoming smaller over time. The New Testament is the first of all the most common types of people. Gómez-Robles' previous research suggestion that teeth tend to evolve at a relatively standard rate across hominin history.

"If we look at these teeth, they are very much the same. older, ”Gómez-Robles says. "

"

Neanderthals and Neanderthals Homo sapiens share the common ancestor, but exactly who that species was, is a difficult mystery to untangle. But there are clues, and the new tooth study is the fossil-rich cave site in Spain's Atapuerca Mountains. Neanderthals are some of the oldest known Neanderthals.

Genetics has helped us peer into the past and sketch out the old branches of the family tree. A 201

6 study of 430-000-year-old Neanderthal remains of the Sima de los Huesos site at the time of the Neanderthal split from the Homo sapiens lineage at 550,000 to 765,000 years ago.

Paleoanthropologist Rick Potts, director of the Smithsonian's Human Origins Program, says that while Gómez-Robles raises some plausible ideas are as standard or predictable as the paper suggest. “She's bitten off an interesting topic here, but I just don't know how to do that. ago, ”Potts says. “A variety of molecular genetic studies suggest it more recent.”

 More Teeth
Teeth are one of the most commonly used human beings.
    
       (Aida Gomez-Robles / Ana Muela / Jose Maria Bermudez de Castro)

It is possible, Gómez-Robles says, that is because of a strong selection for genetic changes. Neanderthals. Homo sapiens The Neanderthal lineage at 800,000 years ago or older

“Everything else, such as the face [and] the anatomy of these hominins, looks kind of intermediate,” Gómez-Robles says. “They look like we'd expect for hominins of that age. But the teeth look very, very different. They look very Neanderthal, and the only thing that's different is the teeth. … If there was a choice of something else, like that. ”

Potts also points out several possible causes of misinterpretation. that could greatly affect the timeline of dental evolution over many thousands of years. He says.

Scientists do have evidence that the speed of tooth development has changed the evolution of the teeth. . Microscopic studies of tooth enamel layers allow for the first molar, showing that 1.5 million years ago, young Homo erectus got their first molar at around 4.5 years old . By about 200,000 years ago, Neanderthals got the same tooth age around 6, as we humans still do today. "And we don’t know when, between 1.5 million years ago and 200,000 years ago," Potts says. “So that a lot of wiggle room.”

Hybridization between different species, is another possible complication. "There's a hell of a breakthrough in interglacial Europe during this time period, where there are populations separating from one another, probably undergoing fast evolution, coming back thousands of years later, ”Potts says.

Given the difficulties of untangling different "We don't know what the effect of the evolutionary population." Ninederthal split, one might wonder why uncovering the true timeline is so important. Gómez-Robles says "Even when the difference is not huge," Gómez-Robles says

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