Sick, Stranded Sea Lion Pups

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Today's Los Angeles Times featured a sad, sad photo earlier today of a sea lion pup looking stranded and forlorn on a Southern California beach. Its one of hundreds who've washed up, sickly and some near death, since the start of the year. Wildlife officials are now calling it an "unusual mortality event." Sharon Melin, a wildlife biologist with the National Marine Fisheries Service, explains what that means and whats happening to these creatures.