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Giant Shark filmed off Japan - "When trying to ascertain its size, researchers took into account the dimensions of the bait container, as well as the length of other sharks that can be seen in the footage before the monster shows up, which were judged to be around 2 meters (6.5 feet) long. Using these as size comparisons, the mystery shark was estimated as being at least 30 feet long, with more exaggerated estimations putting it at more like 50 or 60 feet long."

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Leedsichthys, along with a number of other animals we have talked about in our "Top Ten: Extinct Sea Monsters:" Basilosaurus, Elasmosaurus, Dunkleosteus, Archelon, Megalodon, Tanystropheus, and, of course, Leedsichthys. Hesperornis is also on there, as well.

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As pretty as Brazilian amethyst vugs are, they are still full of crystals. Cleaning this thing would be like trying to floss a Megalodon. Whoever came up with the idea is an evil genius.

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Megalodon Shark Caught on Tape | 2015 | Collection of the Best Part 2 - YouTube

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Click through... so many cute mini-comics! Liz Climo on Tumblr...this really cheered me up

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Megalodon Shark Largest Predator Ever - Jurasic Infographic #prehistoric More

Megalodon Shark: The Largest Predator That Ever Lived [Infographic]

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12 Weird Prehistoric Creatures That Will Make You Glad You're Alive Today

Until about 1.5 million years ago, really, really big sharks called C. megalodon prowled the oceans, representing one of the largest vertebr...

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