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

• Ordovician Silurian Extinction
• Devonian Extinction
• Permian Triassic Extinction
• The Dunkleosteus

Fun Paper Friday

• How can microbes melt glaciers? Find out on this week’s Fun Paper Friday!
• Ganey, Gerard Q., et al. “The role of microbes in snowmelt and radiative forcing on an Alaskan icefield.” Nature Geoscience 10.10 (2017): 754.
• Paper From EarthArXiv

Contact us:

Show - Support us on Patreon! - www.dontpanicgeocast.com - SWUNG Slack - @dontpanicgeo - [email protected]

John Leeman - www.johnrleeman.com - @geo_leeman

Shannon Dulin - @ShannonDulin