cambrian explosion and timeline of evolution i'm willing to help with these articles post a message on my talk page if you're interested i'd better warn you that i have a strong tendency to re phrase existing content as to many articles on science related subjects suffer from logorrhoea which i attribute to academics envy guess the derivation of this phrase i strongly believe that the target audience for wikipedia is non specialists and the target level of fog index should be under you may want to know a bit about my activities as an editor so i wrote most of the content in physiology of dinosaurs now re arranged by others discussions on going most of permian triassic extinction a lot of cretaceous extinction and of archosaur and all of evolution of mammals and i've extensively edited extinction event