The mystery of how early humans survived the Ice Age while Neanderthals disappeared into evolutionary oblivion may lie in their choice of outerwear. Unlike early modern humans, Neanderthals were not equipped with the cold-weather clothing needed to survive the glacial Ice Age.

See the source article by following the link below:
The mystery of how early humans survived the Ice Age while Neanderthals disappeared into evolutionary oblivion may lie in their choice of outerwear. Unlike early modern humans, Neanderthals were not equipped with the cold-weather clothing needed to survive the glacial Ice Age.