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- The natural world, filled with competition for resources and hostile climates, can be tough on animals.
- To survive, animals have had to adapt in surprising ways, like keeping their blood from freezing.
- For example, Australian frogs cocoon themselves in mucus for months at a time.
From the freezing ocean floor to the scorching desert, animals live in some the planet's harshest climates. Over millions of years, they've adapted features to fit in with their environments.
Color-changing camouflage, flapping ears, and toxin-killing bacteria are just a few of the mechanisms animals use to survive.