How an Ancient Rock Carrying Earth’s Oldest Known Crystals Ended Up on the Moon

“Big Bertha,” a lunar rock that was picked up by Apollo 14 astronauts, originated on Earth 4.1 billion years ago, according to a new study. Continue reading How an Ancient Rock Carrying Earth’s Oldest Known Crystals Ended Up on the Moon

Asteroids Crash Into Earth Over Twice as Often as 290 Million Years Ago

Scientists find that a surge in Earth impacts began during the Permian period, possibly because of disruptions in the asteroid belt. Continue reading Asteroids Crash Into Earth Over Twice as Often as 290 Million Years Ago