On World Penguin Day, let’s dive into the fascinating story of why penguins can’t fly, and why that evolutionary twist turned them into the most extraordinary swimmers on the planet.

These penguins can withstand extreme heat. I have always wondered why there are no penguins in the Northern Hemisphere and, at one time, tried to think of puffins as a type of penguin ... have lost ...

Penguins can't fly through the air, ... Hummingbirds, which fly in the air, are the only other type of bird that use both the muscles in their chest and between their shoulders to move their wings.

Penguins can’t fly.And while their wings may seem to be purely decorative, these appendages actually play a larger role in their evolutionary history. A fossil penguin species named Pakudyptes ...

But penguins lost their ability to fly and instead became streamlined swimmers some 60 million years ago, long before the Antarctic ice sheet formed — and researchers have now revealed how that ...

These penguins can withstand extreme heat. I have always wondered why there are no penguins in the Northern Hemisphere and, at one time, tried to think of puffins as a type of penguin.