Every few weeks, they warm up temporarily through bouts of shivering which probably helps to ward off permanent brain damage from the cold. This deep sleep tactic helps the ground squirrels to conserve energy. But it’s a high-risk strategy, and some just don’t wake up. 30,000-year-old frozen ground squirrels have been discovered, still preserved in the underground tombs. 

 

Every inhabitant of Beringia had to have its own way of dealing with the cold, and that included those first people who arrived across the Bering Land Bridge. They knew how to make weapons and cooperate to hunt for food. They made weather-proof clothing out of animal hides and had fire to keep them warm. Without these skills, they couldn’t have survived the endless winters. 

 

But spring bring broughteasier times and excellent hunting opportunities. Spring was when Beringia’s big game gave birth to their young.