Mystery #2Tier 2body / heat
Why do you shiver when you are cold?
When you get cold, your body starts shaking all by itself; your teeth chatter and you can't easily stop it. Shaking seems pointless. So why does being cold make your muscles judder?
Your guess
What's your hunch about why your body shakes when you're cold?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.