The unexpected discovery of a new type of genetic variation suggests that natural selection – the force that drives evolution – is both more powerful and more complex than scientists have thought. "We ...

When most people think about natural selection, they imagine individuals competing with one another: The fastest animal escapes predators, the strongest plant produces more seeds, and the most ...

The common view of natural selection is based solely on the individual: A trait allows an organism to out-compete its rivals and is thus passed down to its offspring. To suggest otherwise can provoke ...