Tim Urban @waitbutwhy
The moon’s craters weren’t made steadily but in a couple heavy asteroid phases. https://t.co/pNgX7RR0jw — PolitiTweet.org
Wonder of Science @wonderofscience
The evolution of the Moon. 4.5 billion years in 2 minutes. Credit: NASA Goddard https://t.co/MaTr2sue6J
