The discovery of a massive crater formed by the impact of a meteorite more than 3.5 billion years ago is changing the way scientists view the history of Earth

This week, geologists announced they discovered the world's oldest known impact crater. It's in Western Australia's ancient Pilbara region.

We have discovered the oldest meteorite impact crater on Earth, in the very heart of the Pilbara region of Western Australia. The crater formed more than 3.5 billion years ago, making it the oldest known by more than a billion years.