The impact zone discovered in the Australian outback – about 300 million years old – is double the size originally thought, making it the largest ever discovered.
The Warburton Basin crater site was discovered in 2013. It is a 400-kilometre wide crash site, which is now believed to have been caused by a meteorite that broke into two before slamming into the ground.
Imagine such an asteroid impact right now! We would probably feel it on the other side of planet Earth!