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A recent study seems to indicate that humans and around 90% of other animal species all arose at the same time around 100,00 to 200,000 years ago. Following are a couple of excerpts from an article on Evolution News pertaining to this idea:
An exciting new paper in the journal Human Evolution has been published which you can read here. Popular science reports such as this have incautiously claimed, “They found out that 9 out of 10 animal species on the planet came to being at the same time as humans did some 100,000 to 200,000 years ago.”
This could indicate intelligent design, an event where species came into existence for the first time. But it could also indicate something else, such as a population crash (or crashes) that affected almost all life on Earth. Either way, if the paper is right, it would be a shock to established scientific expectations.
“This conclusion is very surprising,” co-author David Thaler of the University of Basel is quoted as saying, “and I fought against it as hard as I could.” His co-author is fellow geneticist Mark Stoeckle of Rockefeller University in New York.