Indigenous Fire Management, Oliver Sacks Film. September 25, 2020, Part 1 Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Bill Tripp, whose great-grandmother taught him as a young child how to burn land on purpose to prevent large wildfires later. ( Bill Tripp ) Hosted by Ira Flatow Produced by Science Friday and WNYC Studios