A weather pattern called the Pineapple Express is driving feet of snow in the Rocky Mountains. Here's where the term comes from and how it forms.

From punch card-operated looms in the 1800s to modern cellphones, if an object has an "on" and an "off" state, it can be used ...

Charles Darwin predicted the existence of a moth with a long tongue based on a comet orchid's nectar spurs. This was ...

When some of the most valuable datasets in human history briefly vanished from U.S. government websites, it felt like ...