More than 2 billion years ago, an asteroid slammed into Earth and created a 43-mile wide crater in Western Australia's outback. Now, researchers believe it is the oldest known impact crater, predating others by 200 million years. And it's possible that the impact led to a great thaw as Earth exited a global frozen state.


원문출처 : https://www.cnn.com/2020/01/21/world/earth-oldest-asteroid-impact-scn/index.html