In the mid-20th century, when people looked at a map of the world, they saw the familiar continents surrounded by vast, ...

NAOMI: Oh no! Careful you don't get wet! Most of our planet, Earth, is covered in saltwater. In fact, there's more water than land on the Earth's surface. We call these areas of saltwater oceans.

A newly-deployed satellite has created the most-detailed map yet of the ocean floor, finding hundreds of hills and underwater volcanoes that were previously missed. A new satellite has mapped ...

Because the world is a sphere, it is difficult to accurately project this on a two-dimensional map. When the world is flattened to fit on a piece of paper it is distorted. This makes some ...