PASADENA, Calif., Oct. 15 (UPI) -- U.S. space agency scientists say the Phoenix Mars Lander survived a weekend dust storm that temporarily lowered its solar power.

TUCSON, June 7 (UPI) -- NASA's Phoenix Mars Lander is having trouble placing Martian soil samples into research instruments, project officials in Arizona say.

PASADENA, Calif., June 3 (UPI) -- One week after landing on Mars, the U.S. space agency's Phoenix spacecraft has lifted its first scoop of Martian soil as a test of the lander's robotic arm.

HOUSTON, May 31 (UPI) -- U.S. space officials said exhaust from NASA's Phoenix spacecraft has exposed either rock or ice beneath the Mars lander.

ST. LOUIS, Jan. 3 (UPI) -- The upgraded Spirit rover marked its third anniversary on the Martian surface, riding out a dust storm, rover scientists in St. Louis said.

WASHINGTON, Sept. 7 (UPI) -- NASA's Mars rover Opportunity is closing in on what the U.S. space agency calls an overlooked and rich science trove -- a huge and geologically lush crater.

PASADENA, Calif., Nov. 5 (UPI) -- NASA officials said all the scientific tools on the two Mars Exploration Rovers are still working well, a full 10 months after they landed on the planet.

WASHINGTON, April 15 (UPI) -- The twin robotic rovers, Spirit and Opportunity, have delivered unequal measures of success in the quest for evidence of water on Mars, and the disparity has scientists puzzled and disappointed.

PASADENA, Calif., March 5 (UPI) -- More possible signs of water were reported on Mars Friday.