Penguins can't fly!

Unlike most other birds, penguins can't fly, though this one sure looks like it's trying—or jumping for joy since today is Penguin Awareness Day. Actually, these gentoo penguins on Danco Island, just off the Antarctic Peninsula, were photographed leaping out of the water as they return to their nests for breeding season, which starts in November.
© David Merron/Getty Images