To make sense of some characteristics that species exhibit from birth, you have to turn to an old discredited theory known as Lamarckism.

Researchers say a tiny one-eyed ancestor that lived nearly 600 million years ago may have shaped the evolution of every vertebrate eye, including our own. They also found that its ancient median eye ...

Most people rarely think about which hand they use to button a shirt, hold a spoon or write a shopping list. The choice feels ...

Snakes lost their limbs millions of years ago to become undulating, scaly tubes of muscles. Scientists are finally figuring ...