A fourth, mystery lineage of humans was in the mix, too.
As reported by the news arm of the journal Nature,
new genetic evidence suggests that several hominids — human relatives
closer than humans' current living cousin, the chimpanzee — interbred
more than 30,000 years ago. This group of kissing cousins included an
unknown human ancestor not yet revealed by the ancient DNA record.
"It's implied it could be something like Homo erectus or
similar," said Carles Lalueza-Fox, a paleogenomics researcher at Pompeu
Fabra University in Spain, who was not involved in the research, but who
was present at a talk on the findings....
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