The U.S. government has an official plan for a zombie apocalypse Think The Walking Dead is straight-up fiction? Well, it ...

Why might the U.S. be interested in deep-sea mining, and what are the environmental risks? Here's what you need to know.

Some countries are uniquely isolated, surrounded entirely by water. These nations have no land borders, making them stand out on the map.

Imagine waking up one morning to discover that a tiny reef in the middle of the ocean has suddenly become part of a nation’s ...