TED Ed: Why Do We Have to Wear Sunscreen?

TED Ed: Why Do We Have to Wear Sunscreen?

National "Stay Out Of The Sun Day" is 7/3. 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).

courtesy of Knovation