Welcome to the early solar system. Just after the planets formed more than 4.5 billion years ago, our cosmic neighborhood was a chaotic place. Waves of comets, asteroids and even proto-planets streamed toward the inner solar system, with some crashing into Earth on their way.
![](https://3c1703fe8d.site.internapcdn.net/newman/csz/news/tmb/2019/anewtimeline.jpg)
Source:
https://phys.org/news/2019-08-timeline-earth-cataclysmic.html