NASA @NASA
Early in its history, the Moon had “fire fountains” erupting from its surface. But how did our celestial neighbor cool down and become the quiet, cratered world we know today? Find out by listening to the latest episode of our #GravityAssist podcast: https://t.co/0rq3SZkP6V https://t.co/fZkFFUW1AP — PolitiTweet.org