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Muons were also recently on hackaday. DIY ground penetrating radar ...

Building A DIY Muon Tomography Device For About $100

https://hackaday.com/2025/02/26/building-a-diy-muon-tomograp...

[perihelions]

Also on HN,

https://news.ycombinator.com/item?id=43195525 ("A $100 DIY muon tomographer (ieee.org)", 20 days ago, 45 comments)