"The Universal Solvent" is a 1995 Donald Duck story by Don Rosa. The story was inspired by the novel A Journey to the Center of the Earth and was based on a Pertwillaby Papers adventure titled Vortex. It was also likely a partial sequel of the classic Carl Barks story, "Land Beneath the Ground!". Don Rosa wrote two sequels to this story, called "The Black Knight" and "The Black Knight Glorps Again". The story was first published in the Danish Anders And & Co. #1995-13; the first American publication was serialized in Walt Disney's Comics and Stories #604-606, in August-December 1996.