Some have asked if humans left the planet would apes and chimpanzees take over like we have in 30,000 years or so? Probably not, why bother, they have everything they need and are content, happy, carefree, no-stress, top of their food chain, few enemies [besides them selves and their cousins mankind killing them] that they cannot deal with.
No need to leave the tree line or cover. Unless there was a super environmental change such as an ice age, global warming or volcanoes or such, but if man split from Chimpanzees 1-million years ago, Chimpanzees had their chances to adapt and move beyond, but did not desire or need too you see?
So, for those who ask this question they do so in error. Like wise a any higher order species at the top of their food chain may or may not adapt if their environment does not change.
Mankind constantly does as he keeps changing his environment and even one study recently showed brain cavity expansion of a measurable amount i
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