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 12 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