https://www.cnet.com/news/turns-out-pluto-might-really-be-a-giant-comet/

Scientists from the Southwest Research Institute (SwRI) combined data from NASA's New Horizons flyby of the former planet and the European Space Agency's Rosetta mission that landed on comet 67P to come up with a new explanation for how Pluto came to be.

"We've developed what we call 'the giant comet' cosmochemical model of Pluto formation," Dr. Christopher Glein of SwRI said in a release.