A major evolutionary theory says most genetic changes don’t really matter, but new evidence suggests that’s not true. Researchers found that helpful mutations happen surprisingly often. The twist is ...

Environmental change doesn’t affect evolution in a single, predictable way. In large-scale computer simulations, scientists ...

If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have ...

Why did humans evolve the eyes we have today? While scientists can't go back in time to study the environmental pressures that shaped the evolution of the diverse vision systems that exist in nature, ...

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One hundred years ago, a small town in eastern Tennessee captured the attention of the entire country. A biology teacher in Dayton was accused of teaching human evolution to his students — which was ...