Apollo 17 Moon Rock Indicates Early Formation of Mare Serenitatis

Apollo 17 sample 76535, a rock exposed ~4.25 billion years ago, suggests Mare Serenitatis formed then—300 Myr older than estimates. Sep 18, Geophysical Research Letters. getnews.me/apollo-17-moon-rock-indi... #apollo17 #moonrock #mareserenitatis