www.pbs.org New episode premieres Sunday, November 8, 2009 at 8pm (check local listings). Submit your questions for snake handler Thea Litschka-Koen on NATURE Online. Untreated, the bite of the black mamba has a fatality rate of 100 percent, making it a killer among killers on a continent where it is thought that nearly 20000 people die of snake bites each year. Now snake handlers and Swaziland residents Thea Litschka-Koen and her husband, Clifton, are trying to save lives and change ...