Who's cooler, Danica McKellar or Miss Martian, the green-skinned shape shifter that she plays on Young Justice? Trick question. They're both equally awesome! Sure, Miss Martian can fly and phase through solid objects, but there's no way you can look at see her studio interview and our behind-the-scenes Danica McKellar photos and not be wowed. Beautiful, smart, sometimes-alien, plus she's an author of a series of math-teaching, self-confidence-boosting books for young women...the latest of which is titled Girls Get Curves: Geometry Takes Shape. Get more info on Danica, her books and more at DanicaMcKellar.com!