Even though it’s completely responsible for making life on Earth possible, getting too much sun can be bad for you. Does sunscreen help? What do the SPF numbers really mean? Is sunscreen more harmful than helpful? FiveThirtyEight on why you might just want to stay in the shade.

+ BPA is bad for you. So many manufacturers got the compound out of their plastic bottles and containers. Now it looks like the new compound could be just as harmful.

+ Does some Colgate toothpaste contain known carcinogens?