Latest Mars Ocean Hypothesis Stories
NASA and an international team of planetary scientists have found evidence in meteorites on Earth that indicates Mars has a distinct and global reservoir of water or ice near its surface.
Martian meteorites that fell to Earth are revealing secrets of an early atmosphere on Mars that is hidden in the chemical signatures of each ancient rock. Geologists, who collected and studied 40 of these otherworldly rocks, have found an important key...
The combination of molecular hydrogen, carbon dioxide and water could have created a greenhouse effect on Mars nearly four billion years ago, raising temperatures to the point that liquid water could exist.
Researchers at the Caltech have directly determined the surface temperature of early Mars for the first time, providing evidence that's consistent with a warmer and wetter Martian past.
New research shows that hostile conditions on Mars were much worse 600,000 years ago than they are today, with evidence suggesting the red planet once had a much dustier, stormier atmosphere.
Rocks on Mars dug from far underground by crater-blasting impacts are providing glimpses of one possible way Mars' atmosphere has become much less dense than it used to be.
Researchers have long debated the prospect of finding water on Mars, but a new report from researchers in Spain shows that the Red Planet could have been frozen while still maintaining a habitat for liquid water flows at one point in its history.
Planetary scientists have puzzled for years over an apparent contradiction on Mars. Abundant evidence points to an early warm, wet climate on the red planet, but thereâ€™s no sign of the widespread carbonate rocks, such as limestone, that should have formed in such a climate.
A study of the thermodynamics of clays found on Mars suggests that little carbon dioxide could have been present during their formation, which contradicts a popular theory of the early Martian atmosphere and will send researchers looking for other explanations for clay formation.
- In Roman antiquity, the return of a person who had been banished, or taken prisoner by an enemy, to his old condition and former privileges.
- In international law, that right by virtue of which persons and things taken by an enemy in war are restored to their former status when coming again under the power of the nation to which they belonged.