Scientists have cloned several fluorescent cats that glow in the dark by manipulating or inserting a gene during the cloning process. In October 2008, the cat Mr. Green Genes, whose eyes, gums and tongue glows green in the dark, made its TV debut in the U.S. on NBC.ajcpets: Glow-in-the-dark cat a genetic success (October 22, 2008) In December 2007, Korea researchers announced they had cloned three fluorescent kittens that glow red in the dark.Telegraph: Glow-in-the-dark cat could help cut disease (December 12, 2007)