Tim Friede grew up in a strict, religious household with an obsession for science and a knack for breaking rules. He became fixated on a particular problem: roughly 120,000 people die from venomous snakebites every year worldwide.

He developed a theory that if he could become immune to snakebites, then his blood could be used to develop a better antivenom. So, he got to work. Over nearly two decades, while working odd jobs in factories and as a window washer, he allowed himself to be bitten over 200 times by the world's deadliest snakes, which he kept in his basement. Many of the people closest to him thought he was crazy, until his scheme worked.

Podcast production by Zoe Azulay.

More episodes around risk and self-experimentation:

Why Jeb Corliss Jumps Off Cliffs

Hard: Little Pill, Big Pharma

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