Mount Olympus on Mars stands about 13 miles high — nearly three times the height of Mount Everest.

The ocean contains structures larger than mountain ranges.

The Black Death originated in Central Asia and wiped out roughly half the population of Europe in under a decade.

Pandas have thick fur to survive in mountainous regions.

The ocean contains structures larger than mountain ranges.

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

The largest living structure on Earth is the Great Barrier Reef.

New Zealand was the first country to give women the right to vote, in 1893.

The Great Barrier Reef is located off the coast of Australia.