Mars likely had cold and icy past, new study finds

The question of whether Mars ever supported life has captivated the imagination of scientists and the public for decades. Central to the discovery is gaining insight into the past climate of Earth's neighbor: Was the planet ...

NASA cans lunar rover after spending $450 million building it

NASA announced Wednesday that cost overruns and delays have forced it to cancel a planned moon rover it already spent $450 million to develop, marking a significant setback for the agency's lunar exploration program.