earth, giant impact hypothesis, great oxidation event, moon, permian extinction, permian mass extinction, snowball earth, theia

4 Worst Catastrophes Earth Has Survived

We all at some time or another think about life-changing catastrophes, but have you given much thought to Earth’s life-changing events? Most people have never heard of these catastrophes. 4 catastrophes that have happened to Earth 1. The Giant Impact Scientists think the Moon formed shortly after Earth around 4.5 billion years ago. A new ...