Neanderthals

Neanderthals were not the gentle, almost-human creatures portrayed in the media over the last 150 years. New Australian research reveals they were aggressive, powerful and terrifying carnivores—ruthless and efficient apex predators, who hunted, raped and ate early humans for over 50,000 years. The Neanderthal’s daily diet of nearly 2 kg of meat—the equivalent of 16 Quarter Pounders—included human flesh.

Based on the research, Australian independent scholar Danny Vendramini has developed "Neanderthal predation theory", which argues that the evolution of modern humans— including our unique physiology, sexuality and human nature—is the result of a reaction to this systematic long-term sexual predation and cannibalism by Eurasian Neanderthals...

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Note...I wonder if these "neanderthals" were the black headed beings that Zecharia Sitchin described in his books?