Wanderlust World Wanderlust World During the Last Glacial Maximum, lower sea levels exposed the Bering Land Bridge—a vast, ice-free corridor connecting Siberia and Alaska. Paleo-Indian peoples crossed this bridge on foot between 15,000 and 20,000 years ago, bringing distinctive tool technologies and hunting practices. The land bridge remained passable for millennia, serving as a migration route for humans and animals until rising seas submerged it around 10,000-12,000 years ago.