For eight months of the year, garter snakes in Manitoba, Cananda, hibernate underground, stacking themselves one on top of the other, like cordwood. Only for a few weeks each year do they come out of hiding to answer the call of the wild. It doesn’t take very much for these snakes to whip themselves into frenzied mating balls. One man has made the study of these slippery mating rites his life’s work. Reporter Sy Montgomery trails along with the Snake Scientist.