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Shark scientist reacts to Shark attack videos

A shark scientist reacts to some of the most intense shark attack videos ever filmed—explaining exactly what’s happening beneath the surface. From diver mistakes to misunderstood behavior, he reveals ...
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Shark attack survivor who lost part of her leg to run NYC marathon

ABC News' Danny New talks to Ali Truwit, a 25-year-old swimmer preparing to run in the NYC Marathon two years after surviving a shark attack. CCTV footage captures eruption of Indonesia's Mount Merapi ...