Albinism in humans all vertebrates, including humans. It is due to absence or defect of tyrosinase, a copper-containing enzyme involved in the production of melanin. It is the opposite of melanism. Unlike humans, other animals have multiple pigments and for these, albinism is considered to be a hereditary condition characterised by the absence of melanin in particular, in the eyes, skin, hair, scales, feathers or cuticle. While an organism with complete absence of melanin is called an albino, an organism with only a diminished amount of melanin is described as leucistic or albinoid. The term is from the Latin "albus", "white". There are
My Teacher Is an Alien as a means of communication among other aliens in the galaxy who are trying to decide what they want to do with humans. Susan, the hero of the previous story, tries to save Duncan when Kreeblim is out of her house, however the two of them do not get out of the house in time. At the end of the book, Peter (with enhanced eyesight and no need of glasses) and Broxholm return, and Duncan and Susan decide to help Peter prove to the Interplanetary Council, the ruling aliens of the galaxy, that the human race is worth saving. Peter