Scientists say evolution works differently than we thought

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 that changing environments prevent these mutations from spreading widely before they become useless or harmful. Evolution, it turns out, is less about reaching perfection and more about endlessly chasing a moving target.

source https://www.sciencedaily.com/releases/2025/12/251224032359.htm