This week saw an impressive set of firsts:
-The first proof of water on Mars
-The first toy made in space
“You know the movie Wall-E? We are headed that way, and unless we do something I see very little evidence that things are going to change very much.” Evolutionary biologist Daniel Lieberman discusses his new book, the problem of obesity, and why dieting is just so hard.
PopSci asks whether animals orgasm, how we’d know if they did, and why the topic is increasingly difficult to study.