Mystery ancestor mated with ancient humans. And its ‘nested’ DNA was just found. – Live Science

Today’s humans carry the genes of an ancient, unknown ancestor, left there by hominin species intermingling perhaps a million years ago. 
The ancestor may have been Homo erectus
, but no one knows for sure the genome of that extinct species of human has never been sequenced, said Adam Siepel, a computational biologist at Cold Spring Harbor Laboratory and one of the authors of a new paper examining the relationships of ancient human ancestors. 
The new research, published today (Aug. 6) in the…

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