Extras
Scientists fight to revive the northern white rhino 鈥� before it鈥檚 too late.
Sara Fitzsimmons fights to resurrect a tree that once ruled the eastern U.S. forests.
Deborah Giles and her dog Eba track whale poop to help save endangered orcas.
At La Brea Tar Pits, Emily Lindsey digs into Ice Age life beneath LA鈥檚 surface.
The Glen Canyon Dam promised water and power 鈥� but the river had other plans.
USGS biologists tag humpback chub to monitor life in a changing Grand Canyon river.
A铆da Navarro joins the fight to revive the Colorado River Delta 鈥� and hope is flowing again.
Las Vegas defies the desert with epic engineering 鈥� but at what long-term cost?
Toxic dust, dead fish, and vanishing water 鈥� what happened to California鈥檚 inland sea?
Shane meets the beekeepers and scientists racing to save America's pollination workforce.