This Martian meteorite is the largest piece of Mars we have ever found by a long shot,” Sotheby’s vice chairman of science and natural history Cassandra Hatton explained as NWA 16788 was to be the ...

Is Arizona's most beautiful place an iconic red rock butte, a blue-green waterfall or an otherworldly cave formation? Vote in our stunning views poll.

The origins of plate tectonics on Earth are hotly debated, but evidence from Australia now shows that parts of the crust ...