No hominid ever had an atlatl, ever. The atlatl was the planet's first super weapon and it was the thing which allowed Cro Magnon man to eliminate Neanderthals and other hominids from the planet, and Cro Magnon does not date from further back than around 45,000 years ago.
Apes and hominids did not have the kinds of shoulders you'd want for throwing things or using something like an atlatl. The dating scheme these guys are using is FUBAR.
The relationship between Cro Magnon Man and the people of Genesis...
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