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Photo Gallery: Animal Record Breakers

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In 2005, a great white shark entered the record books by completing the longest shark migration ever recorded. Named Nicole by researchers, the shark made a 12,400-mile (20,000-kilometer) marathon circuit from Africa to Australia. The journey, which lasted nine months, also included the fastest return migration of any known marine animal. Tracking systems showed that Nicole spent a lot of the time near the surface, leading some scientists to believe that sharks use celestial cues to navigate. Photograph by Mike Parry / Minden Pictures