And, although the concepts of some of these channels are very similar to these of a chat room, there is a huge change concerning the two. He found them to be articulate with considerable temperament, a requirement for the results of these kinds of channels. Marshall Cavendish Corporation (2004). Encyclopedia of the Aquatic World. Semmens (2004). "Understanding octopus progress: styles, variability and physiology". O'Shea, S. (2004).