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Age of earliest stone hand axe (2.6 million y) is about as big as Time since the end of the Neogene geologic period (2.58 million y)
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Forest in Ghana (2011) (50,600 km^2)
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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