Monica Gagliano explains how plants can emit their own sounds and also the notion of plants responding to particular frequencie

Bethany Cotton is the Wildlife Program Director for WildEarth Guardians. Guardians works to protect and restore wildlife, wild places and wild rivers in the American west. A native Cascadian, Bethany now calls the Southern Rockies home.

Dave Zirin writes about the politics of sports for The Nation and many other magazines and newspapers. He is the author or co-author of six books, including What's My Name, Fool? Sports and Resistance in the United States, and Game Over: How Politics Has Turned the Sports World Upside Down.