How Narwhals Work

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What's the difference: seal or sea lion?

What's the difference: seal or sea lion?

From ears to fur, seals and sea lions may be related, but they certainly aren't the same. Prove your knowledge on these cousins at HowStuffWorks.

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  • "Arctic Marine Mammals on Thin Ice." ScienceDaily. April 26, 2008.
  • Bobechko, Liann and Steve Stockton. "Mystery of the Narwhal Tusk." Alternatives Journal. 2006. Vol. 32, Issue 1. page 4.
  • Bruemmer, Fred. "Northern Oases: Polynyas, Where Arctic Waters Teem with Wildlife." Canadian Geographic. Jan./Feb. 1994.
  • "Communication and Echolocation." SeaWorld.
  • Cone, Marla. "Dozens of Words for Snow, None for Pollution." Mother Jones. Jan./Feb. 2005, Vol. 30, No.1, pp. 60-67.
  • Culik, Boris. "Monodon monoceros (Linnaeus, 1756)." Whales & Dolphins. Convention on Migratory Species.
  • Eilperin, Juliet. "Scientists Enlist Nature's Divers to Sample Icy Sea." The Washington Post. April 16, 2007.
  • Ferdinand, Pamela. "A Flexible, 9-Ft. Whale Tooth With Super-Sensing Power?" National Geographic. Dec. 13, 2005.
  • Garde, Eva et al. "Age-specific Growth and Remarkable Longevity in Narwhals (Monodon monoceros) from West Greenland as Estimated by Aspartic Acid Racemization." Abstract. Journal of Mammalogy. February 2007. Volume 88, Issue 1.
  • Geddes, Linda. "What's the point of the narwhal's tusk?" New Scientist. Dec. 24, 2005-Jan. 6, 2006. Vol. 188 Issue 2531/2532. page 6.
  • Grady, Wayne. "A Natural History of an Arctic Eden." Equinox. Feb./March 1999, pp 68-75.
  • Holing, Dwight. "The Sound and the Fury: Debate Gets Louder over Noise Pollution and Marine Mammals." The Amicus Journal. Fall 1994, pp. 18-23.
  • "Humans and Dolphins: If Brain Size Is a Measure, We're Not That Different." National Science Foundation. NSF News. Oct. 27, 2004.
  • Jefferson, Thomas A. et al. "FAO Species Identification Guide: Marine Mammals of the World." United Nations Environment Programme. Food and Agriculture Organization of the United Nations. 1993.
  • Johnson, Genevieve. "Seeing with Sound -- Echolocation." Log Transcript. The Voyage of the Odyssey. PBS.
  • Jozefowicz, Chris. "Sensitive Tooth." Current Science. Nov. 3, 2006. Vol. 92, Issue 5, page 4.
  • Laidre, Kristin L. et al. "Diving behaviour of narwhals (Monodon monoceros) at two coastal localities in the Canadian High Arctic."
  • Milius, Susan. "That's One Weird Tooth." Science News. March 25, 2006. Vol. 169, Issue 12. p. 186.
  • "Narwhals May Produce Signature Vocalizations for Communications." ScienceDaily. Oct. 2, 2006.
  • "Narwhals Aid Climate Change Study." Associated Press. Discovery. Discovery News. April 20, 2007.
  • Narwhal Tusk Discoveries Web site.
  • Nicklen, Paul. "Arctic Ivory: Hunting the Narwhal." National Geographic. August 2007. Vol. 212, Issue 2.
  • Nielsen, John. "Scientists Plumbs Purpose of Narwhal's Horn." NPR. Dec. 13, 2005.
  • Nielsen, John. "Warming Waters Threaten 'Unicorns of the Sea.' NPR. May 11, 2008.
  • "Odontocetes -- Toothed Cetaceans." The Hebridean Whale and Dolphin Trust. (July 31, 2008)
  • O'Meara, Stephen James. "A Tooth with a Twist." Odyssey. November 2007. Vol. 16, Issue 8. p. 49.
  • Pfeiff, Margo. "Narwhal hunters." Canadian Geographic. Sept./Oct. 2006. Vol. 126, Issue 5.
  • Stewart, D. Bruce. "Assessment and Update Status Report on the Narwhal Monodon monceros in Canada." Committee of the Status of Endangered Wildlife in Canada. Canadian Wildlife Service. 2004.
  • "The Review of Significant Trade in the Narwhal (Monodon monoceros): A briefing by WDCS for the 20th meeting of CITES Animals Committee." CITES.