Even Charles Darwin was puzzled by the evolution of the vertebrate eye. New research suggests that it traces back to a cyclopean invertebrate with a single eye atop the head.

Discover the latest news, features and articles about the origin of the human species and what makes us different from our ...

The human body is a machine whose many parts – from the microscopic details of our cells to our limbs, eyes, liver and brain – have been assembled in fits and starts over the four billion years of our ...

The earliest ancestors of all backboned animals, including humans, may have viewed the world with four eyes, not just two.

Our remote ancestors likely had dark eyes, whether brown or black. Blue eyes are common in northern Europe and likely emerged some 5,000 years ago. This suggests that genetic evolution can be more ...