Uploaded February 2015 | Updated September 2026, 1 week ago

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"It seems astounding that life has not evolved for more than 2 billion years—nearly half the history of the Earth," said J. William Schopf, a UCLA professor of earth, planetary and space sciences in the UCLA College who was the study's lead author. "Given that evolution is a fact, this lack of evolution needs to be explained."

phys.org/news/2015-02-scientists-hasnt-evolved-billion-years.html