[restornu]

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[Coyoteman]

I checked your link and find: Scientists agree that mammoths and mastodons once inhabited the Americas, and an article in Scientific Monthly, entitled “Men and Elephants in America,” suggests that these proboscidean animals (elephants, mammoths, mastodons) may have survived in the Americas until 1000 B.C. — well within the time frame demanded by the Book of Mormon.

That date relies on a 1952 reference, and radiocarbon dating was just barely invented, so I would not trust that date estimate of 1000 B.C.

Closest I have heard of is 4,000 years ago, when pygmy mammoths still existed on a small island in the Arctic Ocean. They were quickly wiped out when people arrived.

I don't think the US had many that survived much past 10,000 years ago. When the glaciers retreated and people spread, most of the megafauna didn't last long.