Africa is bigger than the US, China, India, and most of Europe combined.

The Pacific Ring of Fire contains many of the world's active volcanoes.

The city of Istanbul spans two continents — Europe and Asia.

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

Fossils have been found on every continent, including Antarctica.

The Ice Age shaped many of today’s landscapes.

The Golden Gate Bridge was completed in 1937.

The United States Senate and House of Representatives form Congress.

The Sahara Desert is roughly the same size as the continental United States.