Rocks may contain clay minerals that form in wet conditions
(NEWSER) - Scientists are marveling over the latest discovery by the Mars rover Opportunity, which seems to suggest that the red planet may be more hospitable to life than previously believed. The venerable robot—now 7.5 years into its exploration of the planet—has found a lighter-colored rock that “is different from any rock we've ever seen on Mars,” says the Opportunity’s lead investigator, according to AFP . More»
