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Science and Nature
Be Smart

Why Are We Warm-Blooded?

Join Joe Hanson as he explores curiosity and illuminates the science behind… well, everything.

Why Are We Warm-Blooded?

Season 9 Episode 6 | 11m 18s | CC

A human with the metabolism of a hummingbird would need to eat about 80,000 calories a day to survive. That’s because staying warm by making your own heat takes a ton of energy; creating your own body heat is incredibly expensive. So, why aren’t cold-blooded… like crocodiles? Here’s the science.

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