NASA @NASA
Water-ice clouds form slowly overnight on Mars and are at their thickest just before sunrise. As the day warms, they disperse quickly and begin reforming at dusk. This supercomputer simulation from @NASAAmes shows the cycle on a Martian summer day: https://t.co/9jP3oeCvSX https://t.co/UqS3xPgxVv — PolitiTweet.org