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?
Sometimes people choose not to eat for religious, political or health reasons. It's called fasting, and it's been popular for thousands of years. What effects does fasting have on the body? Is it safe?
There are several different sinus cavities located on your face. Your ethmoid sinuses are located inside your skull, between your eyes and immediately above your nose. Unlike other sinus cavities, which are large, single air-filled spaces, your ethmo ...