earth, giant impact hypothesis, great oxidation event, moon, permian extinction, permian mass extinction, snowball earth, theia
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 ...
About 700 million years ago, the Earth experienced unusual episodes of global cooling that geologists refer to as Snowball Earth. Several theories have been proposed to explain what triggered this dramatic cool down, which occurred during a geological era called the Neoproterozoic. In a new study published in the April issue of the journal Terra Nova, ...
