Nat Geo Explorer: Zoltan Takacs

Zoltan Takacs has been chasing venomous snakes in the world's most remote locations since he was a teenager. He's traveled to 133 countries and survived seven snakebites. But as a herpetologist and toxinologist, Takacs doesn't go after these deadly creatures just for the thrill; he collects venom and brings it back to a lab, where he and his colleagues analyze it with the goal of treating diseases. "Animal toxins evolved to be perfect killers, but they can also be lifesaving drugs," he says.