This is an interesting article with several points. One humorous bit is:
This is not good news for fans of Mars as a possible colonization site. Nevertheless the authors feel compelled to end on a note of whistling in the dark in the face of physical reality.Many planetary scientists, including Manga, have long suspected that the Martian subsurface would be full of ice. Their suspicions have melted away.
"All my life growing up, I've heard the Earth may become uninhabitable," said study co-author Jhardel Dasent, another graduate student in the lab Wright leads. "I'm at the age now where I can contribute to producing the knowledge of another planet that may get us there."