Reaching its first 100 days of operations, the powerful mineral-detector aboard the newest satellite to circle Mars is changing the way scientists view the history of water on the red planet.

The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), designed and built by the Johns Hopkins University Applied Physics Laboratory in Laurel, Md., has teamed with the five other cameras and sensors aboard NASA's Mars Reconnaissance Orbiter (MRO) to provide new clues about where water could have existed