And, though the concepts of some of these channels are similar to all those of a chat place, there is a large difference involving the two. He uncovered them to be articulate with substantial persona, a requirement for the good results of these channels. Marshall Cavendish Corporation (2004). Encyclopedia of the Aquatic World. Semmens (2004). "Understanding octopus progress: patterns, variability and physiology". O'Shea, S. (2004).