The Amazing World of Cold‑Blooded Animals | BBC Earth

Transcript

I'm in Arizona and that at my feet is a lizard buried in the sand up to its neck. Even while it's buried, it can use the sunshine to warm its whole body. It can control the supply of blood to its head so that it pools in a cavity behind the eye. Soon the blood there is as much as 5° above the temperature of the rest of its body. Then the animal ope... Read More