Once in a while, over the history of life, a new trait evolves that leads to an explosion of diversity in a group of organisms. Take wings, for instance. Every group of animals that evolved them has spun off into a host of different species—birds, bats, insects and pterosaurs. Scientists call these “key innovations.”
Click here for original story, Biologists discover a gene critical to the development of columbines’ iconic spurs
Source: Phys.org