The world's largest employer is the US Department of Defense, followed by China's People's Liberation Army.

Mount Everest is not the closest point to space — due to Earth's equatorial bulge, Mount Chimborazo in Ecuador is actually closest to the stars.

There are more than 17,000 islands in Indonesia — making it the world's largest archipelago country.

Australia is wider than the Moon — Australia is about 4,000 km across, the Moon's diameter is 3,474 km.

The Arctic Circle experiences extreme variations in daylight.

The Black Death of 1347–1351 killed roughly 30–60% of Europe's population.

The Australian lyrebird has such a powerful voice it can be heard over a kilometer away.

The Spanish Armada sailed against England in 1588.

There are lakes beneath Antarctica’s ice.