For years, millions of people traveled through Central America north to the United States. Now that flow is changing ...

Imagine the altered continental geography and potential cultural exchanges if South America and Africa were joined together.

As climate change melts ice sheets and glaciers, water is being redistributed across the globe — and could end up moving the ...

In the grand tapestry of Americana, the invisible line dividing North and South stitches together a patchwork of starkly ...

A long-lost slab of Earth’s crust may be pulling away the bottom of the oldest part of North America, scientists say ...

Seasonal allergy sufferers are being hit with more pollen over a longer season due to rising temperatures alongside extreme ...