At least one-fifth of the Neanderthal genome may lurk within modern humans, influencing the skin, hair and diseases people have today, researchers say. Although modern humans are the only surviving human lineage, other groups of early humans used to live on Earth. The closest extinct relatives of modern humans were the Neanderthals, who lived in Europe and Asia until they went extinct about 40,000 years ago. Recent findings revealed that Neanderthals interbred with ancestors of modern humans when modern humans began spreading out of Africa perhaps about 40,000 to 80,000 years ago, although some research suggests the migration began earlier.{br}{br}View the Entire Article{br}