At the turn of the 20th century, people didn’t know or understand the dangers of radioactive decay. To them, radioactivity was a new, exotic material that some of the world’s leading scientists were hard at work studying. 

Out of this ignorance, some companies started selling radioactive products like soap, toothpaste, and — perhaps most famously — the energy drink called Radithor. Here’s what Radithor did to one of its most devoted customers. Warning: it’s not pretty

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