Geography

5 Movements To Change U.S. State Borders

Talk of changing state borders is nothing new. While most of these movements are a long shot, there's still a chance that some U.S. state borders could change in our lifetimes.

9 Countries With the Most Time Zones

Time zones shape everything from business schedules to flights and international broadcasts. Most follow orderly lines of longitude, but politics, colonization, and geography often twist the map. Here are nine countries with the most time zones.

Geography
What Is the Tropic of Cancer? Earth’s Imaginary Lines, Explained

If you’ve ever wondered what the Tropic of Cancer, the prime meridian, or the equator are, we explain some of the best-known imaginary lines on Earth.

Geography
The 10 Flattest U.S. States

Not all states are created equal — at least when it comes to topography. Here are the flattest states in the U.S., ranked by the difference between the highest and lowest elevation points in each state.

Geography
What Are Earth’s Biggest Seas?

While seas don’t always get the same attention as oceans do, they are just as vital to global climate, trade, and travel. From the remote reaches of North America to the calm blue depths of Southeast Asia, check out 10 of the biggest seas in the world.

Geography