Nova: Arctic Drift

Journey to the top of the world with scientists as they embark on the most ambitious Arctic research expedition of all time. The Arctic-much of it a vast frozen ocean, shrouded in darkness for half the year-is warming at twice the rate as the rest of the globe. Producer: Laurie Cahalane, Caitlin Saks, Ashley Morris, Philipp Griess, Annabel Gillings, Debbie Lowe, Rachel Vaknin, Uli Zahn. Narrator: Jeannette Robinson.