John and Frank Craighead
John and Frank Craighead — identical twins and famed researchers of wild Grizzly bears in Yellowstone Park — were instrumental in the protection of thousands of miles of rivers around the country. They helped envision and write the National Wild and Scenic Rivers Act, which passed in 1968 and now protects 203 rivers nationwide. In 1998, the Audubon Society named the twins among the top 100 figures in conservation of the 20th century.
Maryland natives, growing up just outside Washington D.C in Silver Spring, first found their interest in wild waters and animals along the Potomac River. Their studies of wildlife ecology and their documentary film series “Wild Rivers” helped paved the way for river protection.