December 6, 2005The Mars rovers are getting creaky. But they have far exceeded expectations and presented evidence of water on the red planet. Photos: Mars rovers still chuggingTAGS:scientist, planet, water, vehicle, conference, component
January 24, 2008Pen Hadow, who's preparing for a months-long trek across the Arctic, speaks on climate change, how technology has changed the life of an explorer, and the dangers of swimming with bears.TAGS:ice, survey, measurement, scientist
February 17, 2007Strikes are rare, but the results could be cataclysmic; an early detection system could prevent such impacts, scientists say.
Video: Is there an asteroid in your future?TAGS:gravity, collision, scientist, object, San Francisco, video
December 6, 2006It's not concrete, but scientists say images provide "the strongest evidence to date."Photos: Best evidence yet of liquid water flow on MarsTAGS:evidence, scientist, water, photograph, image
October 26, 2006The two-year mission aims to capture the first-ever 3D images of solar storms--which can pack the punch of an armory's worth of nuclear bombs. Photos: Twin robots to map the sun TAGS:sun, spacecraft, robot, scientist, satellite, space, 3D