Agricultural runoff is the leading cause of water quality degradation in the US — exceeding industrial pollution.

Gymnastics has been part of the modern Olympics since 1896.

Christianity has around 2.4 billion followers worldwide — the most followed religion.

During World War I, German and Allied soldiers spontaneously declared a truce on Christmas Day 1914 and played football in no man's land.

In Chinese mythology, dragons are benevolent creatures associated with water, rain, and imperial power — opposite to Western dragons.

The fastest Olympic swim races are completed in under 25 seconds.

Tug of war was in the Olympics from 1900 to 1920.

Particles can exist in multiple states until observed.

Extreme sports athlete Travis Pastrana became the first person to land a double backflip on a motorcycle at X Games 2006.