Beringia

geographical name

Be·​rin·​gia bə-ˈrin-jē-ə 

variants or Bering Land Bridge

ˈbir-iŋ 

ˈber-

large, currently submerged region between present-day North America (Alaska) and Asia (Siberia) that has been partly or wholly above sea level at multiple times in the past when sea levels were lower