Scientists are at a loss to explain what is killing sea stars along the West Coast. In some places, 95 percent of the population has died, and the ecosystem on the coast is changing as a result. Ben ... more 
Scientists are at a loss to explain what is killing sea stars along the West Coast. In some places, 95 percent of the population has died, and the ecosystem on the coast is changing as a result. Ben Tracy reports. less 
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Thu, Nov 14, 2013 1:03 PM EST