Tigers have round pupils, but domestic cats have vertical slits in the center of their eyes. What gives? A census of the shapes of animals' pupils... Eye Shapes Of The Animal World Hint At Differences ...

Scientists once assumed that evolution would eventually force every member of a species to behave in more or less the same ...

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 ...

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 ...

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 ...

CNN — 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 ...

Animals are getting larger beaks, legs and ears that allow them to better regulate their body temperatures as the planet gets hotter, with birds particularly affected, said Sara Ryding, a researcher ...