Why did he become so famous that mountains, parks, trails, schools, a glacier, a millipede, and even a planet are named after him? This is the story of John Muir's adventurous life, from Scotland to his legendary exploits in America, where he became an inventor, a global explorer, and the first modern environmentalist-- and even made friends with a president! His heart was always captivated by the outdoors and he aimed to experience all he could....