Surprisingly, 85 % of the active galaxies were classified as not being strongly distorted, suggesting that they hadn't experienced major collisions or mergers in their recent past. (sciencemag.org)
These are fast cars that can cause major collisions to a novice driver. (autoquotenow.com)
Conventional wisdom has it that major collisions produce relatively inactive elliptical galaxies. (newscientist.com)