NASA’s Discovery Program has selected two projects, both with Arizona ties, to delve into the ancient history of the solar system.
One craft, Psyche, will head to the asteroid belt between Mars and Jupiter. The other, Lucy, will explore six asteroids that share an orbit with Jupiter. Scientists believe that the targets embody different aspects of early solar system history.
Work in the Chilean desert by Arizona State University scientists has reopened debate regarding the biological origins of Martian silica fragments found in 2007 — and strengthened the case for life on Mars billions of years ago.
NASA’s Spirit rover churned up the opaline silica deposits as it explored the Columbia Hills area of Mars’s Gusev Crater.