The Ancient Secret Behind Why Crabs Walk Sideways!

Scientists discovered that almost all crabs today walk sideways because of one super-smart ancestor from 200 million years ago who figured out this trick! This sideways scuttling [a fast, sideways movement] helped crabs escape from hungry predators by letting them dash in unpredictable directions. It's like discovering that every crab in the world learned one amazing move from their great-great-great-grandparent and never stopped doing it!