Gray blobs floating after Hurricane Irene identified as potato sponges

Most of Hurricane Irene's impacts -- heavy rain, high winds, downed trees, coastal erosion, and storm-tide flooding -- are all too familiar to the storm-weary residents of Chesapeake Bay and the Eastern seaboard. But based on post-storm queries to the Virginia Institute of Marine Science in Gloucester Point, Virginia, one impact remains a mystery -- what are all those "gray blobs" floating atop waterways and strewn along beaches?

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