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NASA's rovers keep rolling toward fresh discoveries ...

A new study by Canadian researchers indicates a woman's chance of breast cancer returning after surgery is significantly reduced by following up with radiation therapy and tamoxifen ...

A team of astronomers has announced the discovery of some of the smallest planets yet detected beyond our solar system: two worlds that represent a new category of extra-solar planets. Each of newly discovered planets is roughly comparable to the planet Neptune in our own solar system, says Geoffrey Marcy of the University of California, Berkeley, a veteran planet-hunter and a codiscoverer of this pair...

A team of astronomers has announced the discovery of some of the smallest planets yet detected beyond our solar system: two worlds that represent a new category of extra-solar planets. Each of newly discovered planets is roughly comparable to the planet Neptune in our own solar system, says Geoffrey Marcy of the University of California, Berkeley, a veteran planet-hunter and a codiscoverer of this pair...

In a dramatic ending that marks a beginning in scientific research, NASA's Genesis spacecraft is set to swing by Earth and jettison a sample return capsule filled with particles of the Sun that might ultimately tell us more about the genesis of our solar system ...

Scientific findings from the NASA rover Spirit's first three months on Mars will be published Friday, marking the start of a flood of peer-reviewed discoveries in scientific journals from the continuing two-rover adventure ...

As winter approaches on Mars, NASA's Opportunity rover continues to inch deeper into the stadium-sized crater dubbed "Endurance." On the other side of the planet, the Spirit rover found an intriguing patch of rock outcrop while preparing to climb up the "Columbia Hills" backward. This unusual approach to driving is part of a creative plan to accommodate Spirit's aging front wheel...

Francis Crick, who helped discover the double helix shape of DNA along with James Watson, has died at the age of 88, his family said on Thursday ...

The Cassini spacecraft successfully performed a critical six-minute trajectory correction maneuver May 27th to put it on course with its first encounter, Saturn's outermost moon Phoebe, set for June 11th. The spacecraft is operating normally and is in excellent health ...

NASA's solar-powered Mars Exploration Rover Opportunity is beginning on Thursday what controllers expect to be frequent use of an overnight "deep sleep" mode to stretch the robot's power supply ...

The leading candidate in an international race to fly people to space aboard a privately developed rocket plans to make his bid for the final frontier in three weeks. Burt Rutan, an aircraft designer, announced Wednesday that he would dispatch his novel craft, called SpaceShipOne, to suborbital altitude on June 21st. One of the company's aspiring astronauts will be aboard.

NASA's solar-powered Mars Exploration Rover Opportunity is beginning on Thursday what controllers expect to be frequent use of an overnight "deep sleep" mode to stretch the robot's power supply ...