A single, 80-foot-tall giant sequoia (Sequoiadendron giganteum) stands alone near the stunning, Victorian-period Italianate mansion in Martinez, California, where John Muir spent the last 24 years of his life. The tree is almost 140-years-old—a youngster compared to many of its species, which can live for thousands of years and reach an average height of 164 to 279 feet. However this sequoia is significant because it is a living connection to America’s most famous and influential naturalist and conservationist, known as the “Father of the National Parks.” Muir had a special affection…