In the deserts of north America something incredible is happening, these arid lands are turning into lush green wetlands and its all because of a very secretive creature who only comes out at night and the results are surprising everyone! Determined, relentless and even stubborn are words commonly used to describe one natures hardest workers, they work tirelessly through the night, night after night, while most people are asleep... I'm talking about beavers of course :) and despite their controversial and complex relationship with man in the past, there are a growing number in the science world who are coming to the realization that beavers could actually be a friend and not foe, who can help us win the fight to save the environment. In this video we will show you how beavers have saved desert rivers over the course of 12 years, and the landscapes beavers create that can help to fight wildfires, reduce drought and reverse declining fish numbers we are going to look at two case studies