Elastin | Secrets of Skin
Why do we get wrinkles? Professor Ben Garrod explores the function of elastin in an animal's skin.
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The rain frog, at top speed, can cover around 38 metres in one night. Not surprising for a frog the same size and shape as a marshmallow.
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How the body keeps warm in cold environments | Inside the Human Body
Using state-of-the-art graphics, Michael Mosley shows what happens in our bodies when we get cold.