Scientists have long agreed that early humans mated with Neanderthals, but a pair of recent studies have shed light on when ...

Breakthrough studies unveil traits of early Europeans and narrow timeline of breeding with Neanderthals - Interbreeding ...

Fossils show humans coexisted with giant sloths and mastodons for thousands of years. Evidence includes modified sloth bones ...

Tens of thousands of years ago, modern humans mated with Neanderthals. But exactly how and when that happened -- and who ...