David Haskell is a biologist who listens to trees. Inside, outside, bark, trunk, leaves, veins, roots. Not just for fun, but as a form of science. David Rothenberg goes for a walk/interview with Haskell, who has been listening to and recording the sounds of urban trees. Haskell can identify leaves by sound, talks about listening as a way of doing science, and explains why nature/culture is a false dichotomy.