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View Diary: New Curiosity Images Bring Home That Mars is a Real Place, We'll Be Seeing Soon With Our Own Eyes (283 comments)

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  •  You are right to question whether liquid water (1+ / 0-)
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    is a guarantee of life. Some NASA boosters seem to think it is, but that is only a guess at present.

    The only way to find out more about this is to look: look at Mars, look at Europa. Look at the atmospheres of extrasolar planets. The looking does not require sending humans into space; it requires probes and telescopes.

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