If you have chronically itchy elbows, you're probably irritated in more than one way, as elbows aren't easy to scratch. For what it's worth, you're also in good company: A certain Civil War general shared your itchy condition.
The human body is full of things that might make you shudder -- sweat, eye gunk, pus, partially digested food. What are some of the ickiest and most nausea-inducing items you're carting around in your person?
During early pregnancy, both male and female human embryos develop something called milk lines, ridges that eventually recede into nipples. Why have some species lost this unisex trait, and can human men actually produce milk?