A Wisconsin man spent decades letting venomous snakes bite him—over 200 times—so he could help develop a universal snake antivenom. Scientists now say his blood is packed with antibodies, making him the ultimate human antivenom factory and a legend in weird science circles.

Thanks to his wild experiment, the "Man Becomes Human Antivenom Factory After Letting Snakes Bite Him 200 Times" is no urban myth—Tim Friede's immune system is now essentially a mobile pharmacy. His efforts may inspire new lifesaving treatments worldwide, redefining heroic science.