Rare photos capture the golden age of space exploration.
In the insular world of dogsled racing, the Yukon Quest is considered the world's most difficult event.
The limpet's hardy teeth may inspire stronger and lighter race cars and boats, a new study says.
Rare double burials discovered at one of the largest Neolithic burial sites in Europe.
A large meteor exploded over Pennsylvania on February 17 in a display also visible from Ohio and New York.
As NASA plans a search for life on Jupiter's moon Europa, some of the ideas for how to find it sound as crazy as they come.
The latest twist in the saga of Greece's austerity and indebtedness has opened old wounds and appealed to old prejudices.
The video may show that Siberian tigers are rebounding in China, where the subspecies had been hunted nearly to extinction, conservationists say.