This site accompanies the PBS series of the same name and constitutes a comprehensive learning resource about evolutionary science for teachers, students and the general public. It is made up of four main components. Firstly there are seven main topics for users to explore which are accompanied by a preview of the relevant episode, together with animations and other interactive material: Darwin; Change; Extinction; Survival; Sex; Humans and Religion. There is also a searchable multimedia library with assets (video, text, web links) organised along lines that correspond to commonly taught topics eg. Natural Selection; Science and Religion. There is a section of Learning Resources for teachers and seven short videos designed to stimulate classroom discussion.