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they all come at the wrong time to explain what's going on. So for example standing on two legs, well, that happened at least 2 1/2 million years ago.
Yesterday I was handling a replica of Ardipithecus ramidus. The 4.4 million-year-old ancestral species which was pretty well bipedal already 4.4 million years ago. So, freeing
up the hands had an impact, but it wasn't the key ingredient. You mention of tools, stone tools are 2 1/2 million years old. Fire, we don't know when it happened maybe half
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