To say sharks are ancient is a behemoth of an understatement. They evolved around 450 million years ago, before Saturn’s ...

August's “planet parade” (also called an alignment) features six planets, four of them visible to the naked eye. Here’s when and where to look on Friday, Aug. 22.

F resh off the excitement of the Perseids meteor shower is a chance to see six planets lined up in the sky at once. These ...