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Watch: Daredevil backflips motorcycle between two barges in London Thames
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11
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1728
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A marine biologist's guide to determining whether floodwaters really are shark-infested
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4
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2151
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Shark inside shark's mouth
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17
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3823
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August 26, 2013
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Watch these frolicking sea lampreys build nests
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6
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1337
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June 22, 2014
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Incredible close-up encounter with great white shark
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14
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2057
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May 6, 2017
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