Mystery #3Tier 2body / skin

Why does the sun tan or burn your skin?

Spend time in strong sunshine and your skin changes, going darker (a tan) or sore and red (a burn). Yet sunlight feels gentle and warm. What in the sunshine is changing your skin?

A woman in a sun hat smiling as she dabs sunscreen onto the face of a happy young boy in a cap, outdoors. — Photo: National Cancer Institute, Wikimedia Commons · Public domain · via Wikimedia Commons

Your guess

What's your hunch about what in sunlight tans or burns your skin, and how your body responds?

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.