There’s nothing chic about walking around looking like a bright red tomato thanks to a sunburn. And since using sunscreen is one of the surest ways to avoid getting burnt, it means that SPF is one of ...

Nothing lasts forever—including sunscreen. Check the sunscreen container to see if it's past its expiration date. If there's no expiration date, then there are other ways to tell whether the sunscreen ...

CR's tests of over 100 sunscreens show that skin protection varies greatly CR has tested around 120 sunscreens in lotion, spray, and stick form. By Trisha Calvo Updated by Daphne Yao There’s an elixir ...

Find out if you’re an S.P.F. savant. Find out if you’re an S.P.F. savant. Credit... Supported by By Simar Bajaj Illustrations by Kate Dehler Beach days and barbecues. Picnics and outdoor concerts.

Anna Wang receives funding from the Australian Research Council, the Gordon and Betty Moore Foundation, the Alfred P. Sloan Foundation, and Moderna Australia. Jon Beves receives funding from the ...