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by perihelions 1524 days ago
Err, that could be depleted uranium.

https://www.nrc.gov/docs/ML0321/ML032180089.pdf
1 comments
giantg2 1524 days ago
It's not shaped like a prism. It has some functionality to it (there are mounting points and a pivot of some sort). Also, I think it came from a military aircraft, so not a 747.
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