Men have nipples, mammary glands and the hormones required, but the ability for male lactation rarely turns on. Here’s why ...

The chain catshark may look like any other shark in daylight, but under blue light, its skin glows neon green. Here’s a breakdown of this remarkable adaptation.

Not all fish play by the same reproductive rules. Evolutionary biology reveals how deception became a successful mating ...

Researchers uncovered millions of ancient plant DNA switches—some older than flowering plants themselves—revealing a hidden evolutionary blueprint stretching back 400 million years. Most people have ...

Most people know only two things about the appendix: You don’t need it – and if it bursts, you need surgery fast. That basic ...

Wild scarlet monkeyflowers in California survived a historic drought by relying on a rapid evolution, marking the first time the process has been observed in the wild.