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 | Phoenix Lander Touches Down Near Mars's North Pole (May 25, 2008) The craft is now the first to successfully land near a Martian pole and should soon begin collecting samples to determine whether the red planet was once habitable. |
 | Early Mars Had Floods, Yellowstone-Like Hot Springs (May 22, 2008) The formation of an Idaho canyon thousands of years ago, along with recent discoveries of ancient hot springs and geysers on Mars, has given scientists a clearer picture of how water sculpted the surface of the red planet. |
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 | Any Possible Mars Water or Life Is Deep Below Surface (May 15, 2008) Mars's ice caps are about five million years old, and its bedrock is puzzlingly cold and thick, reducing the boundary where liquid water may have formed. |
 | Hundreds of Salt Deposits Spotted on Mars (March 20, 2008) The first evidence of chloride minerals on the red planet could lend new vigor to the search for salt-loving life on Mars, a new study says. |
 | Melting Snow Created Mars Gullies, Expert Says (March 19, 2008) Features on Mars that appear to have been carved by fluid were most likely created when recurring climate changes caused snow to fall and then melt. |
 | River-Size "Flash Floods" May Have Carved Mars Craters (February 20, 2008) Puzzling terraced craters may have been carved into by short-lived flows of water the size of the Mississippi or Rhine Rivers, a new study says. |
 | Early Mars Too Acidic, Salty for Life, Experts Say (February 17, 2008) Early Mars was probably a wet world but not a habitable one because of high concentrations of dissolved minerals, scientists have announced. |
 | Alien Life May Be "Weirder" Than Scientists Think, Report Says (July 6, 2007) Scientists need to rethink what constitutes life in their search for ETs and seek out so-called weird life-forms that could thrive in extreme environments, a new report says. |
 | Mars Once Had Oceans, New Evidence Suggests (June 13, 2007) A large basin on Mars's northern plains really did once hold a giant ocean, suggests new research into the planet's shifting poles. |
 | Mars Rovers Find "Best Evidence Yet" of Water (May 23, 2007) An accidental skid by the Mars rover Spirit turned up what experts say is proof that the red planet was once quite wet. |
 | Mars's Ice Patchy, Water Cycle Quite Active, Study Reveals (May 2, 2007) Detailed new scans show that the depth of the red planet's underground ice layer is extremely variable, coming within an inch (2.5 centimeters) of the surface in some places. |
 | Mars Water Traces Left by Springs, Not Seas, Experts Say (March 7, 2007) Curious deposits on Mars that originally appeared to be signs of an ancient ocean were instead produced by water emerging from underground, a new study finds. |
 | New Mars Pictures Show Signs of Watery "Aquifers" (February 16, 2007) Stunning color images offer new evidence that plentiful water once percolated through Martian bedrock—and new hints as to where life might be hiding. |
 | Mars Life May Be Too Deep to Find, Experts Conclude (February 2, 2007) If life as we know it exists on the red planet, it would have to be deeper under the surface than current probes are able to detect, a European team concludes. |
 | Mars's Water Could Be Below Surface, Experts Say (January 25, 2007) Mars may still house large reservoirs of the water and carbon dioxide that once formed the planets ancient atmosphere, new research suggests. |
 | Mars Scientists Intensify Search for Water (December 15, 2006) Spurred on by new evidence of water, experts announced plans to use powerful cameras to seek rock-solid proof that the liquid hasn't stopped flowing on Mars. |
 | Mars Has Liquid Water, New Photos Suggest (December 6, 2006) NASA released images today that reveal water likely flowed through Martian gullies within the past few years, providing a "squirting gun" of liquid water's presence on the red planet. |
 | Viking Mission May Have Missed Mars Life, Study Finds (October 23, 2006) The Viking landers may have missed signs of life on Mars in 1976, according to new research, leading scientists to call for amped-up technology on future missions. |
 | Mars's Peroxide Snow Would Kill Any Surface Life (August 7, 2006) Dust devils on the red planet help spin off poison precipitation that makes life on the surface impossible, scientists say. |
 | Young Mars Was Wet, Mineral Map Shows (April 20, 2006) Mars was once wet, many scientists say. Now it's dry. For the first time, a geological map of the entire planet is revealing the history of its dessication. |
 | Lunar Photos Cast Doubt on Recent Mars Water, Astronomers Say (March 21, 2006) Scientists studying Martian formations that suggest water recently flowed on the red planet might have to curb their enthusiasm—reexamination of lunar photos from 1969 shows similar features on the moon. |
 | THOR Spacecraft to Hammer Out Huge Crater on Mars (January 30, 2006) NASA's THOR mission may blast an enormous crater on Mars in the hopes of unearthing evidence of water-ice in the red planet's potentially habitable zones. |
 | Does Mars Methane Indicate Life Underground? (October 7, 2004) New methane readings from a space probe raise the possibility that microbial life could exist on Mars. Some scientists, though, remain skeptical. |
 | Mars Had Ocean, Controversial New Theory Says (September 22, 2004) A controversial new study suggests Mars had an acidic ocean. The strange brew, spiked with sulfates and iron, could still have harbored life, scientists say. |
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