12.07.2015 Views

presentation, part 1 - Molecular Evolution

presentation, part 1 - Molecular Evolution

presentation, part 1 - Molecular Evolution

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Dust from the impact blocked sunlight from reaching thesurface around the entire globe, making it too dark forphotosynthesis for 2 months to 1 year.From: Smithsonian, Dept. of Paleontology

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