The below article has some great figures and information in it about glacial and nonglacial periods in Earth history. This is great background information for people interested the interactions, of lack thereof, between extraterrestrial impacts and Earth. Some Thoughts on Global Climate Change: The Transition from Icehouse to Hothouse by Christopher R. Scotese, PALEOMAP Project April 26, 2015 v6c https://www.academia.edu/12082909/Some_thoughts_on_Global_Climate_Change_The_Transition_from_Icehouse_to_Hothouse More at https://uta.academia.edu/ChristopherScotese . This includes "Atlas of Earth History" at: https://www.academia.edu/9730874/Atlas_of_Earth_History . Yours, Paul H. ______________________________________________
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