Re: That conclusion seems a bit fast to me
Not fast at all. Here is an extract from a story in The Independent newspaper, as also was noted in this article:
"Scientists led by Roberto Orosei examined that data between May 2012 and December 2015 and found that there was a very sharp change in the radar signals, when looking at the area, which was found 1.5km beneath the surface.
The researchers spent two years ensuring that the data wasn’t the result of some other effect – eventually ruling out every possible explanation apart from liquid water of some kind."
I assume that after they'd finished their examination of the data, it was given to other teams of scientists who tried to tear the conclusions apart. Only now do we get some kind of concensus opinion.
Compare this approach to that of politicians who will have some kind of idea or dream and then wake up and tell you that it's true and that anyone who disagrees with them is a fool or worse.