The captivating inside story of the man who helmed National Geographic from the 1960s to the 1980s is a front-row seat to iconic feats of exploration, from Jane Goodall's first assignment to the discovery of Titanic, offering a rare portrait of one of the most iconic media empires in history. In the middle of the 20th century, there was a man whose name--and magazine--was recognized from Tanzania to Siberia. His vision for a...