A guest appearance by Jack Hanna will add a touch of celebrity to Grand Canyon National Park's May 7, Celebrate Wildlife Day. Hanna, the Emmy Award winning host of "Into the Wild", will join National Park Service biologists to highlight a number of …
Biologists Help Park Get “Chubbier”
When the Glen Canyon Dam was constructed in the 1960s, there were many unintended consequences to the Grand Canyon ecosystem immediately downstream. One of the more high profile has been the plight of native fish species which have struggled to adapt …