NASA scales back flagship Mars mission

NASA scales back flagship Mars mission

Cast of millions puts on Calif. earthquake drill

Cast of millions puts on Calif. earthquake drill

California putting on large-scale earthquake drill

California putting on large-scale earthquake drill

NASA: Phoenix Mars mission has ended

NASA: Phoenix Mars mission has ended

Plants move up mountain as temps rise, study shows

Plants move up mountain as temps rise, study shows

Communications glitch delays Mars lander digging

Communications glitch delays Mars lander digging

Robot digger set to land Sunday at Martian pole

Robot digger set to land Sunday at Martian pole

Forecasters say big quake likely to hit California in next 30 years

Forecasters say big quake likely to hit California in next 30 years