• Do you need sunscreen for your hair? Well, sort of. There's no medical reason, per se (your hair's not actually alive, you know), but there are cosmetic reasons you might want to sun protect it, especially if it's chemically processed. UV rays are super bad for colored and permed hair. Think about it! [Refinery29]

• All acne is not created equal and you can't treat it as such. In fact, doing that will just make it worse most of the time. As G.I. Joe said, "knowing is half the battle," so learn what your spots mean if you want to fight 'em. [Refinery29]

• Science is a wonderful thing. They've gone and invented an actual real thinking cap that is exactly as dorky looking as you imagine it might be. It's equipped to manipulate the speed with which we pick up new things, via the application of a mild electrical current. Kind of amazing, right? [Science Daily]

• There is so much good hair in Girls, that's undeniable. So let's take a look at the best hair from this past season, shall we? [Glamour]

• Kim Kardashian admits terrible things in her new Vogue profile. I suppose if you want to be in Anna's tome you have to give her blood or something. "One time Kourtney and I sat in my mom's closet -- we must've been eight or nine -- and we were like, 'If Mom dies, we're going to write down who gets what," she admitted. "We went through every last piece of her wardrobe. We were so mean then!" That. Is. Morbid. [Us Weekly]

• Birkenstocks are back, people. They are back. And somebody's gone and made them into surreal Magritte masterpieces. What do we think of that? [Racked]

• The people behind that viral kissing video (that was actually an ad for a clothing company) speak out. [Business Insider]