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Have you ever been to Africa?
According to the latest studies on human diversity, you have! Scientists
identified that sub-Saharan Africa is the place where the human migration
phenomenon began 100,000 years ago, when a small group of humans headed for
North Africa and Middle East, and kept on going ever since, reaching the
farthest continents of Americas and Australia.
Up until this point, theories on
a global migration with an African starting point have been circulating, but
none of them brought the arguments and evidence this study did on the topic. Its
like looking back at the earth with a telescope a thousand times more powerful
than what you had before, said Richard Myers from Stanford University school
of Medicine, the journal Science reports.
Two studies have already been
published in the journals Science and Nature on the patterns of genetic mutations
and human diversity, and based on the similar DNA samples, proved one common conclusion:
the modern human left Africa (Addis Ababa, Ethiopia to be more precise),
traversed Central Asia and continued heading east and west to Europe, Asia and
Americas.
Another genetic study, similar
to the other two and published in the journal Nature, concluded that after
the African migration, the newly settled European population started losing
its genetic diversity and at the same time, while continuing to expand on the
continent, they started accumulating a series of genetic mutations before older
ones, with potentially negative impacts, have had the chance to wear out.
What was very surprising was
that many of the groups thought to have one well established origin actually
presented traces to several continents. This was the case of the Bedouins in
the Middle East, who were traced back to Europe and Pakistan, or the Yakut
population, who should have the most similarities with the Siberians, but
actually relate to East Asia, Europe and American Indians.
The conclusion draw attention to
the fact that we are much more related than we think we are, curiously enough, to
people on different parts of the world, more than we are to people around us. A
huge amount of our genomes are the same across the world, and that helps to
argue against racism in my view, Myers said the journal Nature.
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