It is a high-stakes gamble with thousands of human lives on the line.

Humanity may need look no further than our own Solar System in the search for alien life, researchers probing one of Saturn's moons said Tuesday.

In the world's driest desert, an unassuming black box called "Espresso" is about to begin a very big mission: scouring the universe for planets like ours to find signs of life beyond Earth.

SpaceX chief executive Elon Musk plans to blast off his own Tesla roadster Tuesday, atop the world's most powerful rocket in operation, the Falcon Heavy, to the tune of David Bowie's "Space Oddity." 

Russia on Thursday successfully launched 11 satellites from its Vostochny cosmodrome, in the third rocket liftoff from the new spaceport, the space agency said.

Seabiscuit, Secretariat and every nag to ever pull a plow had five toes on each foot, says a study released Wednesday that stomps on the notion modern horses only have one toe.

Buried glaciers have been spotted on Mars, offering new hints about how much water may be accessible on the Red Planet and where it is located, researchers said Thursday.

Rare images of the "world's ugliest pig" have been captured in Indonesia, researchers said Friday, offering a window into a little-known species believed to be on the brink of extinction.

New archeological research has shed fresh light on China's first emperor -- creator of the world-famous terracotta army -- and his quest for eternal life, state media reported.

A species of Mexican fish amasses in reproductive orgies so loud they can deafen other sea animals, awed scientists said Wednesday, calling for preservation of the "spectacle" threatened by overfishing.