Water on Mars of these salts". NASA also reported that Jake M rock, a rock encountered by "Curiosity" on the way to Glenelg, was a mugearite and very similar to terrestrial mugearite rocks. On December 9, 2013, NASA reported that Mars once had a large freshwater lake inside Gale Crater, that could have been a hospitable environment for microbial life. On December 16, 2014, NASA reported detecting an unusual increase, then decrease, in the amounts of methane in the atmosphere of the planet Mars; in addition, organic chemicals were detected in powder drilled from a rock by the "Curiosity" rover. Also, based on
Opportunity mission timeline may clear the dust from its solar panels, as it has happened before. Some of the craters MER-B has investigated Some excitement from finding meteorites, new types of rock or signatures detected from orbit, and speculations on ancient alien fossils which as of yet lean towards geological processes. "Examples" Some other famous targets are the "blueberries" (2004) and "newberries", aka Kirkwood spheres (2012) See also List of rocks on Mars#Opportunity and List of surface features of Mars imaged by "Opportunity" Opportunity mission timeline Opportunity, MER-B (Mars Exploration Rover – B), is a robotic rover active on the planet Mars since