It took 4 years, 38 sled dogs, 12 reindeer, 28 helicopters, and 840 hours trapped in blizzards for dedicated (and resourceful) camera crews to film the epic new nature documentary Frozen Planet. This special showcases the ecosystems and inhabitants of Earth’s most frigid climes with the same expansive, lush cinematography seen in Planet Earth and Life. All three are collaborations between the BBC and the Discovery Channel. With footage of frolicking polar bear cubs, mesmerizing time-lapse video of a frozen waterfall thawing in spring, and an up-close look at how rising temperatures are ravaging those environments, Frozen Planet has something for everyone – even those whose tastes run more to sitcoms than documentary. ( By Mary Beth Griggs from www.discovermagazine.com )