You may be physically fit right now, but if you spent all winter snoozing and starving, you’d emerge looking a lot more “pool noodle” than “beach body.” Yet mammals that hibernate don’t have that problem. Rather than stumbling out of their dens on atrophied legs, they hop right into hunting for food and dodging predators.
How they manage this is a secret they guard in their chilly burrows. Some ground squirrels may have given away a clue, though. Scientists found that their bodies start bui