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'Shark Week' returns for 28th year with first Cuban visit

Sharks are serious business this summer, with "Sharknado"-style flippancy a barely heard echo following grisly attacks on beachgoers off the Florida, California and North and South Carolina coasts. Seriousness also marks the tone of Discovery Channel's Shark Week which, after veering off course with programs that lopsidedly favored thrills over information, aims to bring the balance back to hard science as the annual event begins Sunday. It remains to be seen whether the lineup will satisfy critics of 2014's Shark Week who condemned, among other things, programs awash in what they labeled "pseudoscience." If skeptics remain unswayed, it won't be for...