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Reconstruction of the giant filter feeder, scooping up a plankton cloud. Aegirocassis benmoulae was one of the biggest arthropods that ever lived. Family members include today's insects, spiders and lobsters.
March 11, 2015 This sea monster swam Earth's seas about 480 million years ago and was the biggest creature of its day, scientists say.
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Whatever it is, it's not pretty at this point.
August 23, 2013 Just what did wash up on a beach? At first, there was wild speculation. Now, the thinking is much less dramatic. But check out photos of the rather gross remains found in Spain.
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