NIFSScience Insider
After all penguins are birds, but why can’t they fly?
Vidunenahawula Website (National Institute of Fundamental Studies)
After all penguins are birds, but why can’t they fly? Penguins have strong wings and strong pectoral muscles to power them. Their bodies are streamlined as if for flight, so they still cut cleanly through the water. But water is much thicker than air, so their wings are shorter and stiffer than a normal bird’s wings. In fact, penguins are the only birds that are unable to fold their wings.
