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From the rivers of the Amazon to the Lost Forest in Madagascar, evolutionary biologist Mark Siddall travels the world to discover the stunning diversity and behavior of leeches. Learn about his adventures and the important role leeches and other parasites play in our ecosystem. Includes a live demo of feeding leeches.
Episode filmed live at the 2014 World Science Festival in New York City. The full Cool Jobs program from that year can be viewed online.