Didn't get enough John Muir in Ken Burns' PBS National Parks series? You're in luck: Mighty Muir returns to the network with the documentary American Masters: John Muir in the New World. The show premieresMonday, April 18 from 9-10:30 p.m. on PBS (check local listings) in honor of Earth Day and John Muir Day.
Check out this preview:
Ol' Johnny Muir—is there anything you can't do?