Special Report: Antarctica

See how scientists are tracking Antarctica's meltdown, which could raise sea levels dramatically and cause a crisis around the world if the continent's largest ice shelves–Pine Island and others that drain into the Amundsen Sea–continue to lose ice at dramatic rates. Also, get a rare look at life beneath the frozen continent, a surprisingly colorful and vibrant world where penguins, seals and more exotic creatures thrive in icy waters.