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He named the prehuman species Australopithecus africanus — the southern ape of Africa.

Since its inception over a century ago, the conservation movement has been plagued by a conviction that "real" nature possesses a kind of "prehuman purity," they write.

These demagogues basically tap into the very primitive prehuman programming in the limbic part of the brain.

His greed is hard-wired, a genetic inheritance, a prehuman trait that this human has turned into a rage for power.

They may have revealed a prehuman baseline for many waterways, but they know change is a constant of geology.