This undated photo from NOAA Fisheries Service shows a species of Pacific krill. Millions of the inch-long shrimp-like animals have been washing up on beaches between Eureka, Calif., and Newport, Ore., and scientists don't exactly know why. Strong winds may have pushed them ashore while they were mating near the surface, or they may have run into an area of low oxygen. (Photo by Jaime Gomez Gutierrez/AP Photo/NOAA)
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