On The River Of History

The story of life continues with coverage of the Paleozoic Era 541 to 2519 Million Years Ago We trek through the different periods of this ancient age to uncover how animals plants and microorganisms evolved and coped with a continuously changing climate Special topics include the Cambrian Explosion the Ordovician Biodiversification Event the Colonization of the Land the Evolution of Tetrapods and the horrors of the Permian Extinction Event Transcript httpsriverofhistorytumblrcompost182868647096episode4fromtrilobitestotherapsidsLinks and Referenced MentionedCambrianExtinction Event httpswwwnaturecomarticlesnature09700 Possiblelink to volcanism for Ordovician Extinction Event httpscpbusw2wpmucdncomuosuedudistf94files201405youngetal2009final28qe1mkpdf Helicoprions tooth whorl httpswwwncbinlmnihgovpmcarticlesPMC3639784