Fat Bear Week is upon us.

(Did you think these bears are just getting fat for our entertainment?)

The fatter the bear, the more energy they have to survive.

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But the bears arentasleepthe whole time.

They slow down their metabolisms, and they dont eat, drink, or poop.

(Remember, the bears arenot asleep, theyre just chilling.)

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Baby pandas, like the one above, weigh 3-5 ounces.

Black bears arecommon throughout northern North America, including the northeast and Appalachian areas.

And then, of course, there are the polar bears.

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Their skin is blackthe better to soak up warmth from the sun.

And their fur is not truly white, but transparent.

Theres no truth to this.

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(Thanks, scientists.)

(The roaring sound is added in post production.)

Black bears (the smaller, more widespread American bear) can be brown sometimes.

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And brown bears (the species that includes grizzlies) can have a color anywhere from blond to black.

A lot, it turns out.

Early in the season they eat the fish whole, up to 40 of them per day.

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A full day of eating for one of these bears can weigh in at a hefty100,000 calories per day.

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