The hemotoxins in a tree viper's venom attack human blood cells and can result in an agonizing death in less than 30 minutes. The neurotoxins in a cobra bite can kill a person in half that time. So why has Steve Ludwin has been sticking all this lovely snake juice in a syringe and mainlining it for the last 20 years? Because he's on a quest for immortality. Milking an array of deadly snakes including rattlesnakes and monocled cobras, with a few vipers thrown in the mix, Steve has been injecting what would for any normal human be fatal amounts venom into his body since the late 80s. The basic principle—laid out by pioneer herpetologist Bill Haast, who died last year at the age of 100—is that regular exposure to the venom develops an immunity. Steve claims to never get ill, and that cobra venom is the ultimate pick-me-up, with effects lasting days after injecting, making Steve stronger, faster, and more resilient. And now, it looks like mainstream scientific research might be catching up.