"NASA’s press statement makes it seem that scientists have certain evidence of flowing water. They do not. What they have is chemical evidence that gives a strong suggestion of liquid water mixed with salts. More importantly, however, even if NASA was 100% certain that there is liquid water on Mars, it could not do anything about it."
"The world’s space powers are bound by rules agreed to under the 1967 Outer Space Treaty that forbid anyone from sending a mission, robot or human, close to a water source in the fear of contaminating it with life from Earth."
"All space missions to an alien world are bound by planetary protection protocols. On Mars, these protocols determine which areas a mission can and cannot land, and how far it can explore after landing. And the more we learn about Mars, as a 2014 report makes it clear, the more special regions are being found where we can’t send missions."
If there is liquid water on Mars, no one—not even NASA—can get anywhere near it
No space agency can go to the very regions that may host Martian life.
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