About a year ago, film started to circulate on YouTube? of a remarkable man named Kevin Richardson, an animal custodian in a South African animal park. The film showed Richardson in his day-to-day work, looking some of the world's most dangerous animals directly in the eye, crouching down at their level, playing with them and, sometimes, even kissing them on the nose--all without ever being attacked or injured. The films' popularity skyrocketed and...