I got this from yahoo news: Japanese researches have genetically engineered the world's first 'glow in the dark' monkeys. The monkeys have hair roots, skin and blood glow green under a special light. The breakthrough could lead to new research in neurological diseases such as Parkinson's, despite ethical concerns issue among some scientists.
Five transgenic marmosets were made from eggs that had been modified using a fluorescent jellyfish gene. Professor Hideyuki Okana from Keio University of School Medicine says monkeys make better models for studying human diseases than mice or rats.