The discovery could have been a one - off, so the team has been looking for other places where ancient water exists in deep rocks. (newscientist.com)
The colder model would seem to be a good fit for that, and can also explain various ancient water - related features seen on the surface of the planet. (americaspace.com)
The site is a giant crater called Gale, thought to harbor clues of ancient water activity on the Martian surface (scientificamerican.com)