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People and Neanderthals who have developed from a common ancestor of mystery offer a huge analysis



  People and Neanderthals, evolved from a mysterious ancestor, offer a huge analysis

Here, from the reconstructed Neanderthal skull. Scientists have just examined the shape of the teeth between neanderthals, relatives and relatives to find out when they were divorced.

Credit: Getty Images

Modern people and Neanderthals could have been at least 800,000 years ago. 1

000 teeth from people and close relatives

This new evaluation is much older than previous calculations based on old DNA analysis that balances between humans and neanderthals, as it happened between 500,000 and 300,000 years ago.

externally called the new dental analysis impressive, they note that it is based on one major assumption that the tooth shape is constantly evolving, especially in the Neanderthals. If the shape of the teeth does not change at a constant rate, then "the design of this document collapses," said Fernando Ramirez Rozzi, the center of the French National Research Center in Toulouse, specializing in human evolution. study. [Photos: See the Ancient Faces of a Man-Bun Wearing Bloke and a Neanderthal Woman]

This means that it is quite possible that the teeth (especially the neanderthal teeth) develop at a predictable rate, which means that the calculation of the new test can be applied. "There is an idea now that the shape of the cheek teeth is changing steadily," said Ramirez Rozzi.

Scientists have examined 931 teeth belonging to at least 122 individuals from eight groups, including people and close relatives. Of these, 164 were from the early neanderthals of Sima de los Huesa (Beat of the Bones) in Spain, which includes nearly 30 people who lived about 430,000 years ago in the Middle Pleistocene.

  In total, researcher Aida Gómez-Robles has investigated 931 teeth belonging to at least 122 individuals.

In total, researcher Aida Gómez-Robles has investigated 931 teeth belonging to at least 122 individuals.

Credits: Aida Gómez-Robles

By comparing tooth shape differences between samples, researcher Aida Gomez-Robles, a paleoanthropologist at London University College, has been able to calculate evolutionary dental shape variables and then estimate the difference from the last common ancestor between humans and neanderthals .

The result is that the Neanderthals and modern people probably differed more than 800,000 years ago shows that the ultimate ancestor of these two groups is probably not Homo heidelbergensis as some scientists believe.

" Heidelbergensis cannot take such an evolutionary position because he after the emergence of the differences between neanderthals and modern people," said Gomez-Robles, "Live Science". "This means that we need to look at older species when looking for these common kinds of ancestors."

"also has a great influence on how we interpret fossil records and evolutionary relationships between species," said Gomez-Robles.


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