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Last updated on April 24, 2014 at 21:24 EDT

How Did Mars Lose Its Atmosphere?

September 13, 2012

Though it doesn’t look like a nice place to live now, Mars may have had an atmosphere more like ours on Earth! But how did it lose it? One way a planet can lose its atmosphere is through a process called “sputtering.” In this process, atoms are knocked away from the atmosphere due to impacts from energetic particles.

credit:  NASA