A major expansion at the Greensboro Science Center is now open to the public. It's called Revolution Ridge and showcases several new animal exhibits, including some threatened and endangered species. The more than $15-million expansion spans several acres. It includes a new animal hospital where visitors can watch surgeries and how the animals are cared for, a conservation center, and treehouses. It’s also now home to rare animals like red pandas, pygmy hippos, and okapis.