There's too much to cover here in a short post, but I'll sketch
what I understand as the basics. Denisovans were ?pre-
humans/proto-humans of the genus Homo who died out as a species.
They were genetically distinct from us, but some of their genes
are present in modern humans. The distribution of those genes
today is not random, as shown by the figure above. “We haven’t
been a very exclusive species, with a very narrow origin,” said
Martin Jacobsson. Interbreeding with other members of the human
family tree “is not a unique event. It’s a more complex story
than we thought before.”I'm interested in the South American
hits because of my belief in early colonization of the Americas
from Oceania. I believe there's good evidence that the chickens
in Chile and Peru came from Polynesia in pre-Columbian times. In
a study published Oct. 31 in the Proceedings of the National
Academy of Sciences, Jacobsson and co-author Pontus Skoglund
searched through 1,500 human genome scans from around the world
for genes found in Den