I saw a Discovery Channel special that theorized that an enormous Grizzly-type bear is the culprit that munched on humans who crossed the land
I saw the same thing. It was the ancestor to the Kodiak, or related to it. It was bigger than a modern horse and could run up to 40 mph. The head, teeth and appetite were, of course, just as impressive.
"enormous Grizzly-type bear is the culprit that munched on humans who crossed the land"
I can see a point in that by looking at modern grizzlies who head to river shallows during salmon spawning season.
Ancient bears could have learned that during the short, warm summer, the land bridge would be ripe with two legged beasts.
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