![]() ![]() Tardigrades are microscopic creatures with amazing surviving abilities. Some animals have an extraordinary ability they share with no one in the animal kingdom. ![]() Related: Sunbathing in Winter Comes With Many Health Benefits 3. It must maintain a steady body temperature, regardless of its environment. The squirrel chooses to stay unfrozen because, like us, it can't come back to life after freezing. We must keep this temperature steady, and any extreme change in temperature will lead to death. Warm-blooded animals include mostly mammals, who, like us humans, generate their own body heat. They're fine with it, but not every cold-blooded creature can survive freezing like the talented wood frog. If their surroundings are cold, they're cold too, as simple as that. They don't generate heat on their own. They get their body heat from the environment. Why does one animal choose to freeze while the other avoids it? Frogs, as well as other reptiles, are cold-blooded. ![]() What is the difference between cold-blooded and hot-blooded animals? Some animals, like the arctic ground squirrel, can eliminate all nuclei in a process called supercooling, thus maintaining blood circulation through winter hibernation. In the absence of a nucleus core, water would not freeze, even at subzero temperatures. This nucleus can be as small as a molecule. Water molecules must have a nucleus around which they can form ice crystals. To explain how they do that, we need to understand how water freezes. Other animals do everything in their power not to freeze. ![]()
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