Video: Ancient teeth may alter human origin theory

By
updated 12/27/2010 1:06:52 PM ET 2010-12-27T18:06:52

Israeli archaeologists said Monday that they may have found the earliest evidence yet for the existence of modern humans, and if the find is confirmed, it could upset theories of the origin of humans.

A Tel Aviv University team excavating a cave in central Israel said teeth found in the cave are about 400,000 years old and resemble those of other remains of modern humans, known scientifically as Homo sapiens, found in Israel. The earliest Homo sapiens remains found until now are half as old.

  1. Science news from NBCNews.com
    1. NOAA
      Cosmic rays may spark Earth's lightning

      All lightning on Earth may have its roots in space, new research suggests.

    2. How our brains can track a 100 mph pitch
    3. Moth found to have ultrasonic hearing
    4. Quantum network could secure Internet

"It's very exciting to come to this conclusion," said archaeologist Avi Gopher, whose team examined the teeth with X-rays and CT scans and dated them according to the layers of earth where they were found.

He stressed that further research is needed to solidify the claim. If it does, he said, "this changes the whole picture of evolution."

The accepted scientific theory is that Homo sapiens originated in Africa and migrated out of the continent starting sometime around 80,000 years ago. Gopher said if the remains are definitively linked to Homo sapiens, it could mean that modern humans in fact originated in what is now Israel.

Sir Paul Mellars, a prehistory expert at Cambridge University, said the study is reputable. He said that the find is "important" because remains from that critical time period are scarce, but that it is premature to say the remains are human.

"Based on the evidence they've cited, it's a very tenuous and frankly rather remote possibility," Mellars said. He said the remains are more likely related to modern humans' ancient relatives, the Neanderthals.

Image: Professor Avi Gopher and Dr. Ran Barkai
Baz Ratner  /  Reuters
Avi Gopher and Ran Barkai, researchers from Tel Aviv University's Institute of Archaeology, stand at Qesem Cave, an excavation site east of Tel Aviv, on Monday.

According to today's accepted scientific theories, modern humans and Neanderthals stemmed from a common ancestor who lived in Africa about 700,000 years ago. One group of descendants migrated to Europe hundreds of thousands of years ago and developed into Neanderthals, later becoming extinct. Another group stayed in Africa and evolved into Homo sapiens — modern humans.

Teeth are often unreliable indicators of origin, and analyses of skull remains would more definitively identify the species found in the Israeli cave, Mellars said.

Gopher, the Israeli archaeologist, said he is confident his team will find skulls and bones as they continue their dig.

The prehistoric Qesem cave was discovered in 2000, and excavations began in 2004. Researchers Gopher, Ran Barkai and Israel Hershkowitz published their study in the American Journal of Physical Anthropology.

© 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Interactive: Before and after humans

Discuss:

Discussion comments

,

Most active discussions

  1. votes comments
  2. votes comments
  3. votes comments
  4. votes comments