An underappreciated body fluid is emerging as a powerful tool for research, medical diagnosis and health. Spit, as it turns out, contains all sorts of juicy information. According to researchers at ...

Perhaps if I worked at it, I could think of a more distasteful word with which to start a column, but I sort of doubt it. But let’s forge on. As a kid, I remember seeing globs of white, slimy foam on ...