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A Goodreads user asked this question about The Sixth Extinction: An Unnatural History:
Was anyone else amazed that Darwin's theories of evolution as a gradual process have now been clouded by research about when/why/where extinctions occur?
Dave Nellis Define gradual. In the book itself the author discusses how humans may have caused the extinctions of mega-fauna species over 100,000 years ago.

In ei…moreDefine gradual. In the book itself the author discusses how humans may have caused the extinctions of mega-fauna species over 100,000 years ago.

In either case no, I'm not amazed. The theory states that new species appear slowly, over a long period of time. I don't think anywhere it states that an extinction has to take a similarly long time. (less)
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The Sixth Extinction
by Elizabeth Kolbert (Goodreads Author)
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