NASA @NASA
“We've called the Moon the Rosetta stone, the cornerstone of understanding the history of the solar system.” Lunar samples help us tie specific geological features to celestial events. Dig deep & listen to the latest episode of our #GravityAssist podcast: https://t.co/Tty7wR47dg https://t.co/Ru8fxo1nKt — PolitiTweet.org