Sunscreen Math: Is SPF 30 Twice as Good as SPF 15?

Summer is coming, and if you’re as pasty as I am you may have already gotten your first hint of sunburn this year (since after all, the days are just as long now as in mid-August, though it likely doesn’t feel anywhere near as hot yet). It’s time to go stock up on sunscreen, but you may notice that the labels look a bit different this year. Here’s why. Read More Sunscreen Math: Is SPF 30 Twice as Good as SPF 15?

Science News: 8/14/12

The Mars rovers have been busy sending back pictures this week, with some of the first color pictures coming back from Curiosity and Opportunity still going strong eight years into its mission. We’ve also learned about yet another species of prehistoric humans, the importance of an unexpected substance to the ocean ecosystem, and good news on the alternative energy front.  Read More Science News: 8/14/12