...
Africa as a basin of life seems credible, although i would disagree with the date.
I come from a highly scientific background (especially chemistry) and remain
unimpressed by many dating methods which are dependent on variables which we cannot
claim to have enough knowledge about (e.g. carbon dating is directly proportional
to the amounts of radiation the substance has been exposed to. as we cannot know
for sure that past exposure was consistent with present exposure we cannot rely
completely on such methods).
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