The Olympic rings represent five inhabited continents.

The Earth's rotation slightly bulges at the equator.

The ocean contains structures larger than mountain ranges.

Coincidences happen more often in larger populations.

The Aztec capital Tenochtitlan had a population of around 200,000 in the early 16th century, larger than most European cities.

About 80% of people consider themselves above-average drivers.

The Amazon River discharges more fresh water into the ocean than the next seven largest rivers combined.

The deepest lake in the world is Lake Baikal in Russia — it reaches a depth of over 5,300 feet.

The Arctic Circle experiences extreme variations in daylight.