How peppermint may cool that irritable bowel syndrome. IBS is thought to be caused by permanent agitation of enteric nerves (nerves in the gastrointestinal tract) that become oversensitive to inflammation, often occurring after an infection such as a bout of gastroenteritis (caused by "stomach flu" or food poisoning). Menthol from peppermint and other "cooling" compounds may be able to soothe the bowels and alleviate some of the symptoms of IBS. I think I may have already known this on a subconscious level, since I tend to suck on peppermints when I'm feeling anxious (anxiety and stress are major triggers of IBS).
Superfetation: Pregnant while already pregnant. On the Scientific American Guest Blog, a discussion of the unlikely factors that must happen in concert for a woman to get pregnant again when she's already got a half-done bun in her oven.
How to Boost Interest in Space: Talk About Poop. Yeah, I mean, look. I've seen enough space movies to know that peeing in space has to be pretty tightly controlled, otherwise you've got a big ol' mess (and, actually, I've never heard anyone address the issue of women trying to urinate in space; that's gotta be more difficult). BUT WHAT ABOUT POOPING?!