Earth formed about 4.54 ± 0.05 billion years ago.
Sources
- History of life (en.wikipedia.org)
- https://www.space.com/24854-how-old-is-earth.html (space.com)
- https://pubs.usgs.gov/gip/geotime/age.html (pubs.usgs.gov)
- https://www.planetary.org/articles/how-old-is-the-earth (planetary.org)
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