The Arctic Circle covers about 5.5 million square miles of glaciers, icebergs, sea ice, and permafrost. Here are nine fascinating facts that you might not know about the region, from how it got its name to why its position changes every year.
Time zones were created to simplify our lives. But as the saying goes, time is relative, which is part of what makes time zones around the world so fascinating.
Do crows really recognize human friends? Why do thousands of birds swarm certain neighborhoods? And what's up with crow funerals? Read on for the answers to these and many other questions about one of the most interesting birds around.