HELP PLZ plz help!! what was the last group of people to cross the Beringia land bridge?? And what was their main occupation??

However, it's still a mystery exactly when humans began crossing the land bridge. Genetic studies show that the first humans to cross became genetically isolated from people in East Asia between about 25,000 to 20,000 years ago.

Explanation:

answer; the parasympathetic nervous system;