A study reported in Phys.Org Neandertals and Upper Paleolithic Homo sapiens had different dietary strategies compares how modern humans and Neanderthals got their food. The scientists studied Homo sapiens and Neanderthal teeth to see how their diet varied in response to changes in climate during the ice ages. Neanderthals apparently were eating whatever was available, that is they varied the way the selected their food. They ate more meat during cold spells and more plants during warm spells. In the mean time HS was sticking to pretty much the same range of foods all the time. The authors of the study suggest that this may have been at least in part the reason that HS supplanted the Neanderthals.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.