Donald R. Prothero is the author of over thirty titles in geology, paleontology, and evolutionary biology, including Weird Earth. He has taught college geology and paleontology for forty years at institutions such as Columbia University, Vassar College, Knox College, Pierce College, and Cal Poly Pomona.
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Some 73,000 years ago, the Mount Toba supervolcano in today’s Indonesia erupted, releasing the energy of a million tons of explosives. So much ash and debris was injected into the stratosphere that it partially blocked the sun’s radiation and caused g... SEE MORE