Mount Everest grows slightly each year due to tectonic activity.

The Ice Age featured massive glaciers covering large parts of Earth.

The Earth's crust is divided into tectonic plates.

Canada has more lakes than every other country combined.

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

The Amazon rainforest spans nine countries.

The Nile Delta is sinking — it's being weighed down by sediment and eroded by rising seas.

The Mediterranean Sea connects Europe, Asia, and Africa.

The Nile is generally considered the world's longest river, but some measurements put the Amazon ahead depending on source point.