This has been sitting in my e-mail for a few weeks now. I didn’t want to make a big deal out of it, but my curiosity is always piqued when I get U.S. government correspondence containing the words “life on Mars” in the title — which would be almost never.
A series of depressions discovered on Mars could be entrances to a cave system that might provide shelter for future Mars missions or shed light on whether microbial life forms have ever existed on the “Red Planet.”
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