Plent of six-year olds are able to identify any number of dinosaurs after only a swift glance at a picture or model of it, and one of the most readily-identified amongst the Dinosaur world must surely be the Brontosaurus - That huge, docile plant eater with the incredibly long neck that would find it's food in the high leafy trees of the forest.
So it might come as a shock to some of us to discover that it's just not true - there never was such a thing as a Brontosaurus. The

Structure of the universe, evolution of the universe and the big bang theory--investigate them all here. Get some quick answers to those cosmic questions floating around in your head. Where did the big bang theory come from anyhow?