Scientists from MIThave re-created Martian clouds here on Earth. The Mars Rover Opportunity has taken pictures of clouds in the Martian atmosphere, but scientists wanted to know what conditions must be present to form these clouds. Using a three-story cloud chamber in Germany, the researchers found that in low temperatures, a higher relative humidity than that on Earth must exist in order for clouds to form. The team created 10 clouds over a week’s time, with each cloud taking about 15 minutes to form. They hope their findings will help in creating more accurate models of Mars atmosphere.