The tortoises on some islands have shells that are dome shaped because they eat plants that are low down ... and the Galápagos penguin, the world’s only tropical penguin.

The tortoises on some islands have shells that are dome shaped because they eat plants that are low down ... and the Galápagos penguin, the world’s only tropical penguin.

These birds live primarily in the Southern Hemisphere, including species like the Adelie penguin along Antarctica’s coastlines. The Galapagos penguin is the only one found north of the equator.