Dr. Stefan Huggenberger from the University of Cologne explains sound production in sperm whales in "Moby Dick's Boom Box: Nasal Complex of Sperm Whales," a presentation at the Smithsonian's National Museum of Natural History on Nov. 16, 2011.

To learn more about whale sounds, listen to the Encyclopedia of Life's podcast, One Species at a Time: The North Atlantic Right Whale, to find out how researchers send female whale calls into the water to gather crucial scientific data.