"What did Isaac Newton do when his cat had kittens? Who had green eyes, bright red hair and invented the pendulum? Who hated organ grinders and invented the computer? The Doctor and his companions Nyssa and Tegan take you back and forth thousands of years in time to meet some of the cleverest men who have ever lived. Become a famous scientist yourself!" A book of science facts and quizzes for children. Dents from shelf wear. Some very light creases on the covers. Character of Nyssa created by Johnny Byrne. Some yellowing of the 96 pages with age, but never read. Pages 94 and 96 had the upper right corners folded. Our book number 285.