There are many fascinating and unique organisms on Earth, some of which are rarely known to us. Each of these creatures displays its own special features, shapes, sizes, and incredible abilities. Here ...

Take a close look at a house cat's eyes and you'll see pupils that look like vertical slits. But a tiger has round pupils — like humans do. And the eyes of other animals, like goats and horses, have ...

Researchers at Northwestern University have identified a single mechanical ratio that dozens of unrelated sea creatures, from jellyfish to squid to bony fish, appear to share when they swim. The ...

Remember Darwin's finches? In the 1800s, Charles Darwin traveled to Galápagos Islands, where he documented that birds occupying the island evolved to develop different beak shapes that were better ...

Some warm-blooded animals are experiencing shifts in their body shapes, likely as a response to the pressures of climate change, according to a new review of existing research. Animals are getting ...

It's easy to think of pupils as simple holes that widen in the dark and shrink in the light. But if you look across the animal kingdom, you'll see a variety of pupil shapes: vertical slits in cats and ...

Over the years, scientists have learned about literally thousands of different bird species, and each one sports a distinctive beak shape. But why do bird beaks come in so many different shapes and ...