The circumference (distance around the largest part of the Earth) is roughly 24,898 miles (40,070 kilometers), according to NASA. (This area is also called the equator.) If you estimate that a day ...

The Earth is encircled by an imaginary line known as the equator. Positioned at 0 degrees latitude, it separates the planet ...

Ladies and gentlemen, get ready to get your nerd on. Know what today is? It's Pi Day. What's that you say? Why, it's March ...

Imagine a piece of string wrapped around the Earth's equator - that's about 40,000km ... thing here is to get a sense of proportion. The circumference of a circle is directly proportional to ...