Skull find breaks new ground in evolution study

John Noble Wilford,NYT News Service | Jan 30, 2015

Anthropologists exploring a cave in Israel have uncovered a rare 55,000-year-old skull fossil that they say has a %story to tell of a reverberating transition in human evolution, at a point when and where some early humans were moving out of Africa and apparently interbreeding with Neanderthals.

SKULL
The story is of when the Levant was a corridor for anatomically modern humans who were expanding out of Africa and then across Eurasia, replacing all other forms of early human-related species. Given the scarcity of human fossils from that time, scholars say, these ancestors of present-day non-African populations had remained largely enigmatic.

From the new fossil find, wh8ich could be closely related to the first modern humans to colonize Stone Age Europe, it appears that these people already had physical traits a bit different from the Africans they were leaving behind and many other human inhabitants along the corridor.

Could this support recent genetic evidence that modern Homo Sapiens and their Neanderthal cousins interbred, perhaps in the Middle East and most likely between 65,000 and 47,000 years ago? The discovery team urged caution on the interbreeding issue, but noted anatomical features of the cranium suggesting that some human-Neanderthal mixture had presumably occurred before any encounters in Europe and Asia.

The discovery in Manot Cave in western Galilee, made in 2008 and subjected to years of rigorous analysis, was reported on Wednesday in the journal Nature by an international team of researchers led by Israel Hershkovitz of Tel Aviv University. They said this was “the first fossil evidence from the critical period when genetic and archaeological models predict that African modern humans successfully migrated out of Africa and colonized Eurasia”.

The researchers further concl8uded that the Manot specimen “pr8ovides important clues about the morphology of modern humans in close chronological proximity to a probable interbreeding event with Neanderthals”. They also no8ted that the shape of the cranium established this as a fully modern human at a time when warmer and wetter conditions were favorable for human migration out of Africa. In other words, Dr. Hershkovitz said in an interview, the Manot cranium “is the missing connection between African and European populations”.

SOURCE: http://timesofindia.indiatimes.com/home/science/Skull-find-breaks-new-ground-in-evolution-study/articleshow/46061634.cms

Categories: Asia, Israel

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