Earth's shape can be tested in surprisingly simple ways without relying on space photographs. The strongest part of the evidence is how many independent observations lead to the same answer.

Add Yahoo as a preferred source to see more of our stories on Google. There's a lot more to Earth than meets the eye. Far from being just a roundish rock barreling through space, our planet is ...

Scientists at Yale and in Singapore have devised what may be the ultimate acid test—a comprehensive model for estimating the origins of Earth's habitability, based in part on ocean acidity. The new ...

Thank you to GEB reader Dieter van Werkum for letting us know about a Google Earth quiz maker he has created. See here for a sample of what it can produce, and the source code is on Github. He has ...

On the first Earth Day on April 22, 1970, millions of people gathered in cities across the United States in a demonstration of support for the emerging modern environmental movement and to push for ...