Eye color is shaped by a complex interplay of genetics, microscopic iris structure, and the way light scatters within the eye. While lighting, pupil size, and clothing can make eyes appear to change ...

More than a million years in the making, this gigantic chasm in the Panhandle Plains—and its remarkable hoodoos, pinnacles, ...

To understand birds—their social relationships, their choices, even their feathers—you need to understand the way they see ...

A bizarre, cyclops-like creature from nearly 600 million years ago may hold the key to how your eyes—and even your sleep ...