How does hibernation work? - Sheena Lee Faherty?

Hibernation is when animals sleep super deeply for a long time to save energy during cold months.

Imagine you're playing outside on a sunny day, and it gets really chilly at night. You put on your warmest pajamas, snuggle under the covers, and fall into a deep, cozy sleep, so deep that you don’t even dream or move until morning. Now imagine doing that for weeks, that's what hibernation feels like for some animals!

Hibernating animals prepare by eating lots of food before winter. It’s like when you eat extra snacks before going to a long vacation. They store energy in their bodies, like saving up coins in a piggy bank.

How the body works during hibernation

When it's time to hibernate, the animal's body slows down, its heart beats slower, and it breathes less often. It’s like when you're tired after playing all day, your body takes a break so it can save energy for later.

Sometimes, animals wake up briefly during hibernation to eat or drink, just like how you might get up for a glass of water in the middle of the night!

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Examples

  1. A bear goes to sleep for months without eating.
  2. Some frogs freeze solid and come back to life in spring.
  3. Mice use stored fat to survive the winter.

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