Biologist David George Haskell recorded 12 trees from around the world for his book, "The Songs of Trees." Two of them were in Colorado.
Childs has won awards for his writing about the desert southwest. For his forthcoming book, he started by tracking mammoth hunters in Alaska.
Colorado Springs musician Tom Taylor has paid close attention to the chickadees in his backyard for decades and has noticed evolution in their melodies.
The world famous primatologist visited Colorado to give a talk at CU Boulder, speak with inmates and encourage future generations to protect the planet.
David Sibley writes and illustrates some of the most famous bird guides in the world. He’s in the state to see the Gunnison Sage Grouse, the last North American bird on his life list.
Slideshow: A team at the University of Colorado Museum of Natural History is recruiting volunteers to help save the California condor, which is threatened by lead poisoning from hunters' bullets. The team is also recruiting volunteers to monitor bees in Colorado.