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Did you know?
In 1961, while prospecting for geodes near Olancha, California, three people discovered the Coso artifact, which is claimed to be a spark plug encased in a 500,000-year-old "geode." If true, the item would be an historical anomaly since spark plugs weren't invented until the 19th century.
![Picture The Coso Artifact – A Spark Plug Encased in Ancient Geode](https://unbelievable-facts.com/wp-content/uploads/2022/07/320_optimized-450x300-c-default.jpg)
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