Incredible But True Incredible But True Human World History Makers Cities Of The World Art And Music Sporting Headlines Plant Life Fish, Amphibians, Reptiles Birds and Mammals Creepy Crawlies Marine Life Restless Earth Earth's Secrets Changing Weather Seas And Oceans Comparisons Amazing Structures Machines And Man World Of Inventions Travelling Around Mysterious Universe	Milking Parlour For 10 years a South African doctor milked snakes and used their venom for research. Of the 780,000 snakes that he milked, none bit him.   Previous: Back Book: Incredible But True Section: Incredible But True Chapter: Fish, Amphibians, Reptiles