"Double-A" wrote in message
...

On Saturday, June 1, 2019 at 12:00:03 PM UTC-7, Hägar wrote:
These shots are taken by the Mars Rover Curiosity, showing clouds on Mars.
This indicates that there is water somewhere on Mars and on the surface.
No
water ... no clouds.

https://news.yahoo.com/martian-cloud...164208748.html


How do we know they aren't just Martian dust clouds?

Double-A


*** Well, AA ... a good starting point would be to re-read the attached
article again, paying special attention to the word "noctilucent". Webster
has a rather nice description of it ...