Kgnu - How On Earth

We talk with biologist Douglas Emlen, who says that the evolution of animal weapons, in everything from dung beetles to saber tooth tigers, has him very worried about our HUMAN weapons (starts 4:20) . . . and listeners are invited to join the Sunday, December 14th  73rd Boulder Audubon Christmas Bird Count     Hosts: Jane Palmer, Beth Bennett Producer: Shelley Schlender Engineer: Shelley Schlender Executive Producers: Kendra Krueger, Jane Palmer Listen to the show: