Mars may have harboured life giving water

Recent observations of Mars have suggested the planet may have been covered in vast reserves of water, but that it was too acidic to support life. But now NASA's Mars Reconnaissance Orbiter is reported to have discovered carbonates on the surface that could not have survived in the harsh water thought to have dominated the surface. This strongly suggestes that there were pockets of water on the surface much more conducive to life. Read more at space.com.