The name Brazil comes from the brazilwood tree, which was the country's first major export.

The Pangaea supercontinent existed before breaking apart.

Venice, Italy is built on 118 small islands connected by over 400 bridges and is slowly sinking.

The Sahara Desert receives less rainfall than most regions.

The Ice Age shaped many of today’s landscapes.

The Nile flows northward — it is one of the few major rivers in the world that flows from south to north.

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

Iceland sits directly on the Mid-Atlantic Ridge and is actually spreading by 2.5 cm per year as two tectonic plates diverge.

Ancient volcanic eruptions shaped prehistoric environments.