Is it ironic that the largest animal currently alive on Earth is also one of the most rarely seen? Visit the seas off the southern Australian coast for an up-close look at the mighty blue whale, which can grow up to 100 feet long─with a heart the size of a Volkswagen─yet feeds on tiny plankton. Also includes "Footprints on the Water: The Nan Hauser Story," which chronicles the work of the pioneering American conservationist and sealife expert. 93 min. total. Standard; Soundtrack: English Dolby Digital stereo.