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Is a 60-foot prehistoric shark named Megalodon still out there? Sightings of massive sharks around the world suggest to some that it's possible.
Watch Shark Week videos and celebrate shark week every week of the year. Don't miss Shark Week, only on Discovery!
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Shark Week Videos
Top 5 Legendary Sharks: SubmarineSubmarine is an alleged 24-28 feet long shark with...
Top 5 Legendary Sharks: The CubanThe Cuban, caught in 1945, was originally measured at...
Top 5 Legendary Sharks: ColossusColossus is 16 feet long and as wide as a school bus,...