 The manga never explains why the project was started or how they knew about Chimera Animas and the aliens, but Dr. Shirogane does mention that they must learn how to inject animal genes into human DNA in order to fight the aliens.In the anime adaptation, Dr. Shirogane discovered the fossilized remains of an ancient civilization called the Chimera during an archaeological dig and began researching the race of people who lived there with his assistant Keiichirô Akasaka.This would eventually become the Mew Project.