A robot crab called "Wavy Dave" has helped scientists learn about crab mating behaviors. Male fiddler crabs have one oversized claw, which they use to attract females by standing outside their burrow ...
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A decade ago, I stood on the muddy banks of the Great Marsh, a salt marsh an hour north of Boston, and pulled a thumb-sized crab with an absurdly large claw out of a burrow. I was looking at a fiddler ...
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