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...liquid water may have been spotted on Mars], New Scientist, February 2009 by David Shiga</ref> These observations lead many scientists to reassess the p ...long term stable at any depth within ± 30° of the equator, unless trapped by an impervious overlying layer<ref>Schorghofer, N. and Aharonson, O., 2005. ...

...edia:Quotations#Recommended_use_of_quotations]]: "Editors of controversial subject should quote the actual spoken or written words to refer to the most contro ...ial for large-scale negative effects on Earth's inhabitants or environment by a returned martian life form appears to be low, but is not demonstrably zer ...