CAPE CANAVERAL, Fla. A five-foot (1.5-meter) debris shield being installed on the International Space Station floated away on Thursday during a spacewalk by two veteran U.S. astronauts, a NASA TV broadcast showed. | Video
CAPE CANAVERAL, Fla. Particles blasting out from the sun stripped away what was once a thick, Earth-like atmosphere on Mars, leaving behind a dry and cold world inhospitable to life, researchers said in a study released on Thursday.
CHICAGO A paralyzed man in Cleveland fed himself mashed potatoes for the first time in eight years, aided by a computer-brain interface that reads his thoughts and sends signals to move muscles in his arm, U.S. researchers said on Tuesday. | Video
LONDON Eleven biotech companies and research teams in Britain and the United States were awarded up to $48 million in funding on Thursday to speed development of new antibiotics powerful enough to take on the world's deadliest superbugs.
CAPE CANAVERAL, Fla. SpaceX is aiming for another space industry first on Thursday when it plans to launch a Falcon 9 rocket that has flown before, a key step in billionaire entrepreneur Elon Musk's quest to cut the cost of space flight. | Video
SYDNEY Scientists have found what could be the world's largest dinosaur footprint - measuring nearly 1.7 metres (5.6 ft) - on a remote part of Australia's northwestern coastline.
CAPE CANAVERAL, Fla. Two spacewalking astronauts ventured outside the International Space Station on Friday for a 6-1/2-hour spacewalk, the first of three to prepare the orbiting laboratory for future commercial space taxis and to tackle maintenance chores, NASA TV showed. | Video
LONDON Scientists have found a way to power an experimental kind of electronic skin using solar energy in a further step towards the development of prosthetic limbs or robots with a sense of touch.
CAPE CANAVERAL, Fla. Space Systems/Loral is suing rival Orbital ATK over an alleged theft of proprietary data and business plans for an in-space satellite servicing technology, according to a complaint filed on Thursday.
WASHINGTON Some of the best-known dinosaurs, like Tyrannosaurus rex and Brontosaurus, may be headed for a divorce due to irreconcilable differences.
The governor of Kansas on Thursday vetoed a bill expanding eligibility for Medicaid for the poor under the federal Affordable Care Act (ACA) because the measure was not fiscally responsible and would still fund Planned Parenthood.