Primitive frogs do a belly flop: Study shows that frogs evolved jumping before they refined landing

Sometimes divers, to their own painful dismay, do belly flops. But did you ever see a frog belly flop? That's just what primitive living frogs do, according to a new study looking at the evolution of frog jumping and landing. They found that frogs became proficient at jumping before they perfected landing. This evolutionary split, characterized by an inability to rapidly rotate the limbs forward during flight in order to land front legs first, might also explain why primitive frogs' back legs are out-of-phase with one another when they swim.

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