Mars Atmosphere My Not Be Gone, But Hidden
Rather than having had its air knocked out into space, Mars might just be holding its breath.
New findings suggests the missing atmosphere of Mars might be locked up in hidden reservoirs on the planet.
Liquid water once flowed on the red planet’s surface. Evidence from channels and gullies recently spotted on Mars suggest the water layer might have been more than half a mile deep in places.
Where the atmosphere went is still unclear, but the authors speculate that it might still be contained somewhere beneath the Martian surface.
http://www.space.com/scienceastronom...tmosphere.html