In 2002, Crater Lake National Park ecologist Michael Murray thought the park’s majestic whitebark pine trees were as good as gone. An invasive fungus called white pine blister rust was killing the trees around the crater of the lake. …It was accidentally introduced to the U.S. in a shipment of infected nursery trees from Europe around 1900. Since then, it’s wiped out millions of whitebark pine trees and threatened the survival of the species. But Oregon scientist Richard Sniezko, a geneticist with the U.S. Forest Service, said some whitebark pine trees have natural resistance to the blister rust disease. …Murray took this science with him to his current job as forest pathologist for the ministry of forests in British Columbia. In 2013, he launched Canada’s first blister rust resistance program for whitebark pine, and he has identified about 25 trees in British Columbia that can survive blister rust infection.