Theories abound about why Neanderthals went extinct, and we modern humans like to think it was because we were more fit to survive the long haul.

But that’s not necessarily so. Neither species had an inherent advantage over the other, but humans were already showing a love of travel–long before planes, trains, automobiles and luxury Mediterranean cruises. Humans, who were already in Europe and Asia, were “supplemented” by human reinforcements coming in from Africa. It wasn’t many, but enough to give humans an edge in numbers . . . and over the next several thousand years, the Neanderthals simply died out.

Click here to read the story, or watch a video summarizing possible theories below.