Did You Know Penguins Have Knees?

For real.

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But it turns out they do in fact have knees.

Not that you would know it from looking at them waddle.

Exhibit B:

New England Aquarium / Via penguins.neaq.org

This image shows a penguin's legs bent at the knee.

A penguin’s leg is made up of four bones: a short femur, a knee, a tibia, and a fibula. Their legs just look short and stubby because feathers cover the top parts.

Walking has a higher energetic cost for penguins than it does for most birds. Scientists think this came about as a compromise between movement on land and in water.