Next airing Tue Feb 9, 5 p.m. ET

American Beaver

A "tail" of power, domination and triumph over adversity -- we'll follow this tireless engineer as she struggles to survive while facing the challenges of predators and the fury of the elements. Using a custom-designed camera system, NGC tracked the American beaver for one year to see how her constant need to build not only changes the terrain but also affect the species surrounding her.