A new paper has come out which announces the finding by a team of paleoanthropolgists who studied the age of sediments surrounding fossils of the common ancestors between humans, chimps, and apes. The date at which humans split from chimps has been pushed back by 2 million years to 8 million years ago. The date at which humans and chimps split from apes has also been pushed back by 2 million years to 10 million years ago.
lanl.gov: Fossil analysis pushes back human split from other primates by two million years
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