
Neanderthals
and modern humans weren’t the only humanoid species that coexisted with each other.
Due to recent discoveries of finger bones in a Denisova cave on Altali
Mountains of Asia suggests that Denisovans coexisted with these other species.
After an analysis on the finger bone was complete a new line in the family tree
for humans was discovered on a genome sequence. The Denisovans DNA was found in
the native populations of Australia and New Guinea. Funny enough the DNA seems
to be absent on mainland Asia even though the fossil was found there. It is now
speculated that this DNA pattern could only exist if the Denisovans
successfully cross the marine barrier known as the Wallace Lines (biogeographic
barrier that formed along the east coast of Borneo). The biogeographical
barrier marks the division of European and Asian mammals. Since the DNA was not
found on the mainland of

Asia it is assumed that no interbreeding occurred here
suggesting the Denisovans made the marine crossing. The genome map shows
evidence of the Denisovans breeding with modern human females. This discovery
of a new human species existing is substantiated by the new discovering of the
human species Homo Floresiensis (hobbit) in Indonesia confirming there were
other human species. The questions that arise now is how were Denisovans able to
cross the marine environment? New research shows scientists following the lineage
to the ancestors of New Guinea and Australia.
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