BBC: Scientists Discover New Race of Human Beings ~ Video Report

The ancient humans have been dubbed “Denisovans” after the caves in Siberia where their remains were found.

Professor Chris Stringer: “It’s nothing short of sensational – we didn’t
know know how ancient people in China related to these other humans”

Scientists
say an entirely separate type of human identified from bones in Siberia
co-existed and interbred with our own species.

The ancient humans have been dubbed “Denisovans” after the caves in Siberia where their remains were found.

There is also evidence that this population was widespread in Eurasia.

A
study in Nature journal shows that Denisovans co-existed with
Neanderthals and interbred with our species – perhaps around 50,000
years ago.

An international group of researchers sequenced a
complete genome from one of the ancient hominins (human-like creatures),
based on nuclear DNA extracted from a finger bone.

According to
the researchers, this provides confirmation there were at least four
distinct types of human in existence when anatomically modern humans
(Homo sapiens sapiens) first left their African homeland.

Along
with modern humans, scientists knew about the Neanderthals and a dwarf
human species found on the Indonesian island of Flores nicknamed “The
Hobbit”. To this list, experts must now add the Denisovans.

The
implications of the finding have been described by Professor Chris
Stringer of the Natural History Museum in London as “nothing short of
sensational”.

Scientists were able to analyse DNA from a tooth
and from a finger bone excavated in the Denisova cave in southern
Siberia. The individuals belong to a genetically distinct group of
humans that were distantly related to Neanderthals but even more
distantly related to us.

The finding adds weight to the theory
that a different kind of human could have existed in Eurasia at the same
time as our species.

Researchers have had enigmatic fossil
evidence to support this view but now they have some firm evidence from
the genetic study carried out by Professor Svante Paabo of the Max
Planck Institute in Leipzig, Germany.

“A species of early human living in Europe evolved,” according to Professor Paabo.

“There was a western form that was the Neanderthal and an eastern form, the Denisovans.”

The
study shows that Denisovans interbred with the ancestors of the present
day people of the Melanesian region north and north-east of Australia.
Melanesian DNA comprises between 4% and 6% Denisovan DNA.

David
Reich from the Harvard Medical School, who worked with Svante Paabo on
the study, says that the fact that Denisovan genes ended up so far south
suggests they were widespread across Eurasia: “These populations must
have been spread across thousands and thousands of miles,” he told BBC
News.

One mystery is why the Denisovan genes are unique in
modern Melanesians and are not found in other Eurasian groups that have
so far been sampled.

‘Fleeting encounter’

Professor
Stringer believes it is because there may have been only a fleeting
encounter as modern humans migrated through South-East Asia and then on
to Melanesia.

No one knows when or how these humans disappeared
but, according to Professor Paabo, it is very likely something to do
with modern people because all the “archaic” humans, like Denisovans and
Neanderthals disappeared sometime after Homo sapiens sapiens appeared
on the scene.

Source Article from http://feedproxy.google.com/~r/AscensionEarth2012/~3/SGfmt0u2RBY/bbc-scientists-discover-new-race-of.html

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