The National Elk Refuge is marking the 40th anniversary of the Endangered Species Act with activities at the Jackson Hole and Greater Yellowstone Visitor Center in Jackson Saturday. Spokesperson Lori Iverson says naturalists will be on hand to discuss Wyoming’s threatened and endangered species and offer a quiz for participants to test their knowledge on the subject. She says it gives them a chance to see what they know about endangered species in their state. Iverson says, “We wanted to join in with the Fish and Wildlife Service’s commemoration of this important event and look forward to sharing some information on Saturday.” Iverson adds that visitors unable to come by the Visitor Center Saturday will still have an opportunity to learn more about the Endangered Species Act, try their hand at a quiz. The answer key, and other on-line resources are also posted on the National Elk Refuge’s web page at http://1.usa.gov/JVDioP .