Ridiculous!
"Everybody knows," Bob, that liquid water is "impossible" at the surface of Mars under present conditions, as was "conclusively proved" by Mariner 4 in 1965.
And "everybody knows" that Gil Levin is a crank, Bob.
(The wonder is that tests that showed liquid water was possible at the surface of Mars under present conditions were done by Gil-the-Crank and almost no one else. Why should anybody test what "everybody knows?")
And as for: Arkansas-Oklahoma Center for Space and Planetary Sciences
Who can believe what they say?
(/snark)
Cheers, BRFelix