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Crabs evolved their body shape at least five separate times — but the sideways walk happened exactly once
There are roughly 7,000 species of true crabs on Earth, and nearly all of them scuttle sideways. That quirky gait is so universal it seems inseparable from being a crab. But a growing body of research ...
A Trendelenburg gait is characterized by a certain walking style. It causes you to appear like you're swaying from side to side when you're walking. It may look as though you're missing steps or ...
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