slight decline from , in which the devastating Permian–Triassic extinction event is an important factor; and a swift rise from to the present. See also History of evolutionary thought On the Origin of Species Speciation Taxonomy of commonly fossilised invertebrates Treatise on Invertebrate Paleontology Viral evolution Footnotes References Bibliography "Proceedings from Nobel Symposium 70 held at Alfred Nobel's Björkborn, Karlskoga, Sweden, August 29 – September 2, 1988" "Preview booklet for 'Gondwana alive : biodiversity and the evolving terrestrial biosphere', book planned for September 2000, and associated projects." Further reading External links General information on evolution compiled by Roger Perkins. Tree of life diagram by Neal Olander. Tutorial created by Dennis O'Neil. Evolution-related timelines Paleontology Evolutionary biology Earth sciences Geochronology