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![infodexx Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1931640894966616064.png) Infodex [@infodexx](/creator/twitter/infodexx) on x 1221 followers
Created: 2025-07-17 03:23:57 UTC

Before 1945, steel was radiation-free.

But after nuclear testing began, all modern steel became slightly radioactive due to atmospheric fallout.

🔬 For decades, scientists sourced “low-background steel” from: – WWI & WWII shipwrecks
– Pre-1945 hospital & factory equipment

Modern radiation detectors, space telescopes, and sensitive medical instruments required it.

(Scientific American)


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**Related Topics**
[fallout](/topic/fallout)

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