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hibernation

Hibernation
Image: BBC/George McCarthy

Hibernation

Winter's cold can make life difficult for many animals. Think about it: You wouldn't want to have to find your dinner under a foot of snow.

Some animals migrate to warmer regions, but others do something different. They hibernate. They find a snug place, stock up on food, and take a very long nap.

BBC
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How Hibernation Works

How Hibernation Works

Although we often think of hibernation as sleep, it is really very different. Get details about the body changes that go along with hibernation. More...

Article
HowStuffWorks
Hibernating Black Bear: Medical Marvel

Hibernating Black Bear: Medical Marvel

Dr. Paul Iaizzo does heart research. So why is he climbing into bear dens? Find out what hibernating bears have to do with human hearts and other muscles. More...

Profile
University of Minnesota
Human Hibernation

Human Hibernation

Humans don't hibernate. But studying animal hibernation could help us save human lives. Find out how. More...

Video
NOVA/PBS
Bear Hibernation

Bear Hibernation

Each fall, bears make careful preparations for their annual hibernation. Watch a mother black bear and her cubs get ready. More...

Video
Animal Planet
Cute Marmots Waking Up from Hibernation

Cute Marmots Waking Up from Hibernation

Vancouver marmots hibernate more than half the year, using up most of their fat stores. But the process of waking up also takes lots of energy, not to mention a toll on their bodies. More...

Video
BBC
Frozen Frogs

Frozen Frogs

You've heard the expression "frozen stiff"? It's not just an expression for one species of frog. And studying this unique form of hibernation could someday help humans. More...

Video
NOVA/PBS
Hibernation: What Is it?

Hibernation: What Is it?

What is hibernation? Why do animals hibernate? How do they survive without eating or drinking? Get answers to those questions and more. More...

Article
YPTE
Image Gallery: Hibernation

Image Gallery: Hibernation

From garden snails to chipmunks to Nile crocodiles, all different kinds of animals hibernate. Check out this collection of more than 50 photos. More...

Images
ARKive
Monarch Butterfly Winter Migration

Monarch Butterfly Winter Migration

It’s a mystery how monarch butterflies find the same trees to hibernate in year after year. See what threats they face each winter. More...

Video
Discovery
Salmon Collapse Could Be Bad News for Bears

Salmon Collapse Could Be Bad News for Bears

Many bears depend on large quantities of salmon to fill up on before they hibernate. A sharp drop in the number of salmon could mean serious problems for bears — and people. More...

Interactive
Scientific American
The Ultimate Hibernation Quiz

The Ultimate Hibernation Quiz

Think you know everything there is to know about hibernation and why some animals "check out" for the winter? Use this quiz to check your facts or prepare for a test. More...

Interactive
HowStuffWorks

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