Get ready for a whale of a good time with two extraordinary maritime adventures from Smithsonian Networks. Explore Australia's dazzling undersea world in these wonder-filled documentaries, featuring rare and astonishing footage. The Big Blue - As much as 100 feet long, weighing up to 180 tons, with a heart the size of a Volkswagen and a tongue that weighs more than an elephant, the Blue Whale is a sight to behold. Come along as the planet's largest living creature enjoys a feeding frenzy! BONUS: Footprints on the Water: The Nan Hauser Story, following the personal quest and groundbreaking work of the American conservationist. Secrets of the Great Barrier Reef - Just a few nights after the November full moon, one of nature's most extraordinary events explodes into life. Thousands of coral join in an elaborate mating ritual, a synchronized dance of naturally occurring phenomena. Journey through more than 1,200 miles of Australia's treasured Great Barrier Reef to discover the secrets of its unique marine life inhabitants.