Ted: Ted Ed: Why Do We Have to Wear Sunscreen?

You already know that a trip to the beach can give you a nasty sunburn, but the nitty gritty of sun safety is actually much more complex. Wrinkle-causing UVA rays and burn-inducing UVB's can pose a serious risk to your health (and good looks). So what can you do? This learning module makes the case to slap on some physical or chemical SPF daily. [5:02]