http://www.bbc.co.uk/news/science-environment-19184370
Dan manusia yang dungu- dungu kayak anjing seperti Abbas Amin, arra_s, ayub
yahya, Dipo, johny-indon, PAREWA PAREWA, Pinpin, rezameutia, Roman Proteus
safin_blanc masih saua percaya bualan orang Arab primitif penyusun khurafah
najis al-Mushaf yang membual bilang tahayul allah hasil khayalan orang Arab
primiitf itu menciptakan Adam dari tanah lihat...
Otak yagn bisa dipakai buat berfikri dan harga diri itulah yagn tidak dimiliki
Abbas Amin, arra_s, ayub yahya, Dipo, johny-indon, PAREWA PAREWA, Pinpin,
rezameutia, Roman Proteus safin_blanc itu.
BBC News Science & Environment
8 August 2012 Last updated at 17:06 GMT
Many human 'prototypes' coexisted in Africa
Pallab Ghosh By Pallab Ghosh Science correspondent, BBC News
Fossils from Northern Kenya show that a new species of human lived two million
years ago, researchers say.
The discoveries suggests that at least three distinct species of humans
co-existed in Africa.
The research adds to a growing body of evidence that runs counter to the
popular perception that there was a linear evolution from monkey to ape to
modern human.
The research has been published in the journal Nature.
Anthropologists have discovered three human fossils that are between 1.78 and
1.95 million years old. The specimens are of a face and two jawbones with teeth.
The finds back the view that a skull found in 1972 ago is of a separate species
of human, known as Homo rudolfensis. The skull was markedly different to any
others from that time. It had a relatively large brain and long flat face.
But for 40 years the skull was the only example of the creature and so it was
impossible to say for sure whether the individual was an unusual specimen or a
member of a new species.
With the discovery of the three new fossils researchers can say with more
certainty that H.rudolfensis really was a separate type of human that existed
around two million years ago alongside other species of humans.
For a long time the oldest known human ancestor was thought to be a primitive
species, dating back 1.8 million years ago called Homo erectus. They had small
heads, prominent brows and stood upright.
But 50 years ago, researchers discovered an even older and more primitive
species of human called Homo habilis that may have coexisted with H. erectus.
Now it seems H. rudolfensis was around too and raises the distinct possibility
that many other species of human also existed at the time
This find is the latest in a growing body of evidence that challenges the view
that our species evolved from monkeys in a smooth linear progression. Instead,
according to Dr Meave Leakey of the Turkana Basin Institute in Nairobi, who led
the research the find shows that there was a diversity early on in the
evolution of our species.
"Our past was a diverse past," she told BBC News, "our species was evolving in
the same way that other species of animals evolved. There was nothing unique
about us until we began to make sophisticated stone tools."
In other groups of animals many different species evolve, each with new traits,
such as plumage, or webbed feet. If the new trait is better suited to the
environment then the new species thrives, if not it becomes extinct. According
to Professor Chris Stringer of the Natural History Museum in London, fossil
evidence is increasingly suggesting that human evolution followed the same
pattern.
"Humans seem to have been evolving in different ways in different regions. It
was almost as if nature was developing different human prototypes with
different attributes, only one of which, an ancestor of our species, was
ultimately successful in evolutionary terms," he said.
According to Dr Leakey, the growing body of evidence to suggest that humans
evolved in the same way as other animals shows that "evolution really does
work".
"It leads to amazing adaptions and amazing species and we are one of them," she
said.
Follow Pallab on Twitter
More Science & Environment stories
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'Cold fusion' chemist dead at 85
BBC
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more.
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