Human evolution is often told as a tidy story of adaptation, yet some of our most familiar body parts still defy straightforward explanation. From the jut of the human chin to the curve of the outer ...

Some people say that today there are almost no "blank spots" left on our planet - that is, places completely unexplored by humans. And therefore, supposedly, life today has become more boring than, ...

Your kidneys are like filters. Your brain is like a computer. Your digestive system is like a tube. Your hands are controlled a bit like a marionette. These comparisons exist in part because doctors ...