It's always been hard for me to believe that humans spent thousands of years, thinking and thinking, before they finally realized that wood could float.
They walked across on the ice during the last Ice Age.
These people have European DNA:
Bye, Bye Beringia (8,000 Year Old Site In Florida)
"At Windover, more ancient human remains were discovered than the total of all others found previously in the New World, and they were the oldest."