Russia is so large it spans 11 time zones.

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

Ancient civilizations often formed near rivers.

The Ganges Delta is the world's largest river delta, covering over 100,000 square kilometers.

Australia is wider than the Moon — the continent spans about 4,000 km coast to coast.

The Great Wall of China is not visible from space with the naked eye — this is a common myth.

Ancient volcanic eruptions shaped prehistoric environments.

The Caspian Sea is the world's largest inland body of water and is classified as a lake despite its salt water.

The Great Rift Valley in Africa may eventually split the continent in two, forming a new ocean in millions of years.