"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: Evolution is often portrayed as stepping toward ...

SEATTLE – Evolution is supposed to inch forward over eons, but sometimes, at least in the case of a little fish called the threespine stickleback, the process can go in relative warp-speed reverse, ...

Evolution is usually a forward-moving process, honing every single living thing to perfectly fit its environment. Every generation is formed from this process over the course of millions of years. But ...

Natural selection can reverse evolution that occurs through sexual selection and this can lead to better females, new research shows. Natural selection can reverse evolution that occurs through sexual ...

In his book, Wonderful World, Stephen Jay Gould writes about an experiment of 'replaying life's tape', wherein one could go back in time, let the tape of life play again and see if 'the repetition ...

The process of speciation (when one species splits into two distinct species that can no longer mate efficiently) takes thousands of years, and the mechanisms underlying speciation are therefore ...

Here’s what you’ll learn when you read this story: Evolution is often portrayed as stepping toward ever-greater complexity, but the natural world is filled with examples of organisms actually ...