The 500,000 Year-Old Spark Plug

The Coso Artifact - a man-made, cylindrical object apparently encased in a geode - was discovered by Wallace Lane, Virginia Maxey and Mike Mikesell while prospecting for gems in Olancha, California on February 13th, 1961.
The OOPArt (or ‘out-of-place artifact’) caused a sensation amongst Creationists, Forteans and conspiracists, who believed it might be up to half a million years old - but has since been identified as a 1920s-era Champion spark plug.
In this episode, Arion, Rebecca and Olly consider whether the ‘Rock Hounds’ were deliberately defrauding people, or were just open-minded enthusiasts; ask why their find had such resonance with Creationists, when its existence cannot be consistent with the world being merely thousands of years old; and reveal how the ‘mystery’ was conclusively debunked… 
Further Reading:
• ‘When Some 1920s Garbage Was Mistaken for an Ancient Artifact’ (Smithsonian Magazine, 2017): https://www.smithsonianmag.com/smart-news/1920s-garbage-or-ancient-artifact-probably-1920s-garbage-180962081/
• ‘Hidden History - Lost Civilizations, Secret Knowledge, and Ancient Mysteries, By Brian Haughton’ (Red Wheel/Weiser, 2007): 
https://www.google.co.uk/books/edition/Hidden_History/295EDwAAQBAJ?hl=en&gbpv=1&dq=coso+artifact&pg=PT173&printsec=frontcover
• ‘Coso Artifact: Science Triumphs Over Theorists’ (Science For Everyone, 2022): https://www.youtube.com/watch?v=GawHMQpIGrU

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The Retrospectors are Olly Mann, Rebecca Messina & Arion McNicoll, with Matt Hill.
Theme Music: Pass The Peas. Announcer: Bob Ravelli. Graphic Design: Terry Saunders. Edit Producer: Ollie Peart
Copyright: Rethink Audio / Olly Mann 2025.

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