1) The world's longest traffic jam occurred in China in 2010 and lasted for 12 days, stretching over 60 miles (97 km).

2) Mountains are important water sources, as they capture and store precipitation, feeding rivers and supporting ecosystems downstream.

3) The Federal Reserve System, often referred to as the Fed, is the central banking system of the United States.

4) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.