I've heard that the bering straight land bridge hypothesis is outdated and not fully supported by data, but how on earth would early man have gotten to the Americas otherwise? They couldn't have had the seafaring technology to make it across the ocean could they ?
There's always from for discussion but perhaps these previous topics from our FAQ will answer your inquiry.
Earliest Peoples in North America by /u/Reedstilt
Clovis culture and the first people in America by /u/RioAbajo
How come America was not "discovered" via the Bering Strait? by /u/Reedstilt
What is the main evidence proving or disproving the Bering Strait Migration theory? by /u/RioAbajo