April 21 - 28 is International Dark Sky Week, a global celebration of the night sky during which like-minded organizations ...

A gigantic dam, our extraction of groundwater, melting ice sheets and rising sea levels are all altering Earth’s spin. The ...

One billionaire wants to move industry off-world, returning Earth to a pristine state. The other wants to colonise Mars.

NASA’s Mars Reconnaissance Orbiter captured an image of the Curiosity rover driving through the Gale Crater. The spacecraft ...