For most people, Memorial Day marks the first day of summer. The official first day of summer is not observed until three weeks later, on June 20, but the three-day weekend gives people a chance to ...

During a recent lecture on evolution, I had to explain the differences between three different processes known as geographic, temporal and behavioral isolation. Geographic isolation is the easiest of ...

Think of nature and we think of color: a red sunset, a green forest, a blue ocean. Such scenes, simply described and instantly imaginable, are actually made up of a myriad of hues, tints, and ...