The United States purchased Florida from Spain in 1819.

The Pacific Ocean borders more countries than any other ocean.

The CN Tower in Toronto was once the tallest free-standing structure.

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

Zhangye once stood along the Silk Road as a trade hub.

The Great Wall of China stretches over 13,000 miles.

There are mountains on Earth taller than Everest when measured from base to peak underwater.

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

The Ice Age shaped many of today’s landscapes.