Waves crash against a sea wall  beneath the Golden Gate Bridge in San Francisco, California, on  December 16th, 2014. The state of California’s water deficit now stands at some 42 cubic km - the volume of water that would be needed to replenish the state’s depleted rivers and recharge underground aquifers. Photograph: Robert Galbraith/Reuters

California is bone dry - and getting even drier as a three-year drought continues. Its water deficit now stands at some 42 cubic km - the volume of wa(...)

The early Earth was hit by a fast moving asteroid so large that its impact likely made the oceans boil.

The early Earth was hit by a fast moving asteroid so large that its impact likely made the oceans boil. It would have kicked off tsuna(...)

Artist’s concept showing Nasa’s twin Voyager spacecraft exploring a turbulent region of space known as the heliosheath, the outer shell of the bubble of charged particles around the sun. Photograph: Nasa

There is no dispute that the little spacecraft Voyager 1 has boldly gone w(...)