Extinctions are pretty common in the rock record, but there are 5 times in Earth’s past where more than 50% of the life on Earth died, these are known as mass extinctions. This week we talk about causes of mass extinctions and some of the strange life that existed. Mass Extinctions <ul> <li><a href= "https://en.wikipedia.org/wiki/Ordovician%E2%80%93Silurian_extinction_events"> Ordovician Silurian Extinction</a></li> <li><a href= "https://en.wikipedia.org/wiki/Late_Devonian_extinction">Devonian Extinction</a></li> <li><a href= "https://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extinction_event"> Permian Triassic Extinction</a></li> <li><a href="https://en.wikipedia.org/wiki/Dunkleosteus">The Dunkleosteus</a></li> </ul> Fun Paper Friday <ul> <li>How can microbes melt glaciers? Find out on this week’s Fun Paper Friday!</li> <li><a href="https://www.nature.com/articles/ngeo3027">Ganey, Gerard Q., et al. “The role of microbes in snowmelt and radiative forcing on an Alaskan icefield.” Nature Geoscience 10.10 (2017): 754.</a></li> <li><a href= "https://eartharxiv.org/c58a3/download?format=pdf">Paper From EarthArXiv</a></li> </ul> Contact us: Show - <a href= "https://www.patreon.com/dontpanicgeo">Support us on Patreon!</a> - <a href= "http://www.dontpanicgeocast.com">www.dontpanicgeocast.com</a> - <a href="https://softwareunderground.org">SWUNG Slack</a> - <a href="https://twitter.com/dontpanicgeo">@dontpanicgeo</a> - show@dontpanicgeocast.com John Leeman - <a href= "http://www.johnrleeman.com">www.johnrleeman.com</a> - <a href= "https://twitter.com/geo_leeman">@geo_leeman</a> Shannon Dulin - <a href= "https://twitter.com/ShannonDulin">@ShannonDulin</a>

Episode 160 - "Giant bolide burning in the background" - Extinctions Part 1

John Leeman and Shannon Dulin discuss geoscience and technology weekly for your enjoyment! Features include guests, fun paper Friday selections, product reviews, and banter about recent developments. Shannon is a field geologist who tolerates technology and John is a self-proclaimed nerd that tolerates geologists.