And other recent science discoveries
Did Humans Evolve From Tree-Dwellers or Animals on Ground?
This discovery lends support to the theory that humans didn't evolve from tree dwellers, but from ancestors who were already adapted to walking on the ground.It's All In the Wrist
The researchers compared the fossilized wrist joints from known human ancestors with the wrist joints of other primates. The wrist anatomy of Lucy and her cousins resembles that of chimpanzees and gorillas in having features that buttress the wrist joint and help to lock the wrist into a stable position so that the animal can support its weight on its fingers. It was not until the later species, A. africanus, at 2 to 3 million years ago, that evidence of a more humanlike, flexible wrist joint exists.
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