The oldest asteroid collision on the planet, the Yarrabubba impact crater in Western Australia, is a whopping 2.229 billion years old. After analyzing minerals at the crater site, researchers have found the asteroid hit at the end of an era called Snowball Earth (one of the planet’s ice ages). Scientists, led by Dr Timmons Erickson (a geochronologist at Houston’s NASA Johnson Space Center), studied around …
Earth’s Oldest Asteroid Impact is Two Billion Years Old
