"Bear Hibernation: More Than A Winter’s Nap"
"Scientists are watching to see how bears will tweak their habits as the climate warms."
"Every spring, as days in the north stretch longer and melting snow trickles into streams, drowsy animals ranging from grizzlies to ground squirrels start to rally from hibernation. It’s tempting to say that that they are “waking up,” but hibernation is more complicated and mysterious than a simple long sleep: Any animal that can spend months underground without eating or drinking and still emerge ready to face the world has clearly mastered an amazing trick of biology.