Humans may not have survived without Neanderthals

Far from triumphantly breezing out of Africa, modern humans went extinct many times before going on to populate the world, new studies have revealed.

The new DNA research has also shed new light on the role our Neanderthal cousins played in our success.

While these early European humans were long seen as a species which we successfully dominated after leaving Africa, new studies show that only humans who interbred with Neanderthals went on to thrive, while other bloodlines died out.

In fact, Neanderthal genes may have been crucial to our success by protecting us from new diseases we hadn’t previously encountered.

The research for the first time pinpoints a short period 48,000 years ago when Homo sapiens interbred with Neanderthals after leaving Africa, after which they went on to expand into the wider world.

Homo sapiens had crossed over from the African continent before this, but the new research shows these populations before the interbreeding period did not survive.

Prof Johannes Krause of the Max Planck Institute of Evolutionary Biology, in Germany, told BBC News that the history of modern humans will now have to be rewritten.

“We see modern humans as a big story of success, coming out of Africa 60,000 years ago and expanding into all ecosystems to become the most successful mammal on the planet,” he said. “But early on we were not, we went extinct multiple times.”