I remember Walt Disney’s “True-Life Adventures” of the 1940s and ’50s with little fondness. Indeed, The African Lion, The Living Desert, and all the others bored me to a state of stupefaction. Back then, my idea of exploring frozen tundra was to look into the icebox to see if my sister had eaten all the Popsicles, and the only savannah on my horizon was the front lawn I (...)