I read the summary reports by experts, and that's their explanation (incidentally, I'm not sure about counts, but "tens of millions" sounds high for most megafauna species -- their small numbers is part of their survival problem).
If I remember right, the last time I read this story was at the elephant exhibit at the San Diego Zoo, or perhaps the standing exhibit at the La Brea Tar Pits. I'm just an interested outsider, so that's good enough for me.
IIRC, the whole Bering Straits story is itself more complex than I learned in grade school. It was open longer, and was wider and bigger than originally thought. I believe humans came across in several waves that are genetically or archeologically separable. I read a lot of stuff in Science, and remember about 20%, and 50% of those memories are part-wrong, so take this with a grain of salt. ;-)
If I remember right, the last time I read this story was at the elephant exhibit at the San Diego Zoo, or perhaps the standing exhibit at the La Brea Tar Pits. I'm just an interested outsider, so that's good enough for me.
IIRC, the whole Bering Straits story is itself more complex than I learned in grade school. It was open longer, and was wider and bigger than originally thought. I believe humans came across in several waves that are genetically or archeologically separable. I read a lot of stuff in Science, and remember about 20%, and 50% of those memories are part-wrong, so take this with a grain of salt. ;-)