The shortest commercial flight in the world is between two Scottish islands — it lasts about 90 seconds.

The entire population of Earth in 1 AD was around 300 million — roughly equal to the current population of the United States.

The Great Emu War of 1932 involved Australian soldiers attempting to control emu populations.

The Sahara Desert is roughly the same size as the continental United States.

The city of Istanbul spans two continents — Europe and Asia.

The ocean contains structures larger than mountain ranges.

Greenland is 80% covered by ice — if it all melted, global sea levels would rise about 20 feet.

The Sahara Desert was once home to large lakes and grasslands.

The largest desert in the world by area is Antarctica.