HumansKissing may have evolved in an ape ancestor 21 million years ago Rather than being a recent cultural development, kissing may have been practised by other early humans like Neanderthals and our ape ancestors ¿ìè¶ÌÊÓÆµ
HumansNeanderthal-human hybrids may have been scourged by a genetic mismatch When Homo sapiens and Neanderthals interbred, a genetic variation affecting red blood cells may have hindered reproduction in women who were hybrids, and this might have played a part in Neanderthals’ demise ¿ìè¶ÌÊÓÆµ