We've felt an odd void for nature programming on our HDTV, so National Geographic's Earth: The Biography
series comes at an excellent time. As usual, high definition makes the seven continent journey pop, starting off tonight with an episode on volcanoes, followed immediately by a second focusing on ice. We don't have to tell you how great an experience Planet Earth
was (and the real sequel isn't due til 2012
), so we don't recommend missing any part of this three night event.