Pour some milk in a dish (whole milk works best, but honestly, use whatever's not expired), drop in some food coloring, then touch it with a dish soap-dipped cotton swab. The colors will scatter like ...

When we say “salt”, we usually mean the stuff we sprinkle on our chips, which is sodium chloride (NaCl). But, technically speaking, this is just one example of a salt. In chemistry, a salt is an ionic ...

This interview was originally broadcast on May 22, 2001. Eating out has taught many Americans to be knowledgeable about ordering subtle and complex dishes from around the world, but it's left many of ...