Photo of liquid water on Mars - maybe

[bailey]

Uhuh, sure, because an entire pole gets sublimate in the atmosphere without leaving any trace of it in that atmosphere.

No. There's water vapor in the atmosphere of Mars. Not much, but some. The find is interesting because liquid water has not been observed at the surface before. Is this really that difficult to understand? Or are you just looking to mock it for some reason?

There always was water vapor in the atmosphere, the amount of water vapor hasn't changed since half the pole "sublimated".

Which begs the question; if water sublimates on Mars, how come they're wondering there's liquid water now?

Because water on Mars doesn't sublimate, and Nasa scientists are a bunch of idiots.

There is also the fact that you are succumbing to an Earth centric interpretation of Martian conditions. Much of the content of ice poles on Mars that changes through the course of the year is not water ice, but CO2 ice.