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Carboniferous Giants And Mass Extinction: The Late Paleozoic Ice Age World,New Whitmont How To Supervise Your SubPicture A World Of Dogsized Scorpions And Millipedes As Long As A Car; Tropical Rainforests With Trees Towering Over 150 Feet Into The Sky And A Giant Polar Continent Five Times Larger Than Antarctica. That World Was Not Imaginary; It Was The Earth More Than 300 Million Years Ago In The Carboniferous Period Of The Paleozoic Era. In Carboniferous Giants And Mass Extinction, George R. Mcghee Jr. Explores That Ancient World, Explaining Its Origins; Its