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March 1, 2011 11:17 AM Subscribe
Why are arthropods the only animals with more than four legs?
posted by curious nu to science & nature (41 answers total) 4 users marked this as a favorite
Mammals, lizards, amphibians, birds.. all two or four legs. Is there absolutely no evolutionary benefit to having more legs if you're over a certain size or weight? Why would this be the case?