Want to watch better-quality PBS Video? Sign in to access HD streaming!
Giant beavers, which were the size of black bears, once roamed the lands of Ohio, along with mastadons and mammoths. Natural history curator David Dyer gives us some insight into these historic mammals and their prevalence in Ohio.
Upgrade Your Viewing Experience
This video is available to CallSign viewers with a Passport account. Passport gives you access to a wealth of premium content not previously available online, including full seasons of your favorite shows.