Mongolia is the most sparsely populated country in the world, with only about 5 people per square mile.

The largest island in the world is Greenland.

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

Japanese has three separate writing systems used simultaneously — hiragana, katakana, and kanji.

The Age of Exploration connected continents through sea travel.

In 1932, Australia deployed machine guns against flocks of emus during the Emu War.

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

Africa is so large that the United States, China, India, and most of Europe could all fit inside it simultaneously.

The Three Gorges Dam spans the Yangtze River.