Discover places like the Taiga forest—stunted conifers on the edge of the Arctic, which in their brief summer season account for a third of all trees on the earth—in Seasonal Forests, while Ocean Deep takes us two kilometers down to the seafloor, including time-lapse footage of a whale carcass being scoured clean by eels, crabs, and giant isopods. Each DVD contains two or three episodes from the series.