Science & Nature

Mankind may have unleashed the sixth known mass extinction in Earth's history, according to a paper released by the science journal Nature.

The U.S. Air Force's secretive X-37B space plane is poised to launch on its second mission Friday (March 4), though what exactly it will be doing once it leaves the ground remains a mystery.

You'll never look at hummingbirds the same again. The Pentagon has poured millions of dollars into the development of tiny drones inspired by biology, each equipped with video and audio equipment that can record sights and sounds.

A robotic system shutdown interrupted Monday's spacewalk outside the International Space Station, leaving an astronaut stuck with an 800-pound pump in his hands for nearly a half-hour.

Even a regional nuclear war could spark "unprecedented" global cooling and reduce rainfall for years, according to U.S. government computer models. Widespread famine and disease would likely follow, experts speculate.

More than 150 are feared dead after a major earthquake hit Christchurch, one of New Zealand's biggest cities, in what the prime minister described "New Zealand's darkest day".

The world is overdue a ferocious 'space storm' that could knock out communications satellites, ground aircraft and trigger blackouts - causing hundreds of billions of pounds of damage, scientists say.

Call them brain pacemakers, tiny implants that hold promise for fighting tough psychiatric diseases — if scientists can figure out just where in all that gray matter to put them.

The strongest solar flare in four years disrupted radio communications in southern China, according to the China Meteorological Administration.

Scientists in Iceland are warning that another volcano looks set to erupt and threatening to spew-out a pall of dust that would dwarf last year's event.