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19/01/2013 Calcium deposits are discovered on Mars by Curiosity Rover

They are similar to those seen on Earth when water circulates in cracks and rock fractures. The main goal of the mission was to determine whether Mars could ever have supported life. Water presence is crucial for life as we know it. Curiosity rower operated on Aeolis Palus plain inside the Gale Crater, which could have been filled with water to some degree in the past.