Indicators of Past Ice Ages
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14:04 - 15:37 (01:33) / 1.9 MB
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"Brian Edwards", data, "Ice Age", "Earth's orbit", "drill core", "deep-sea sediment", fossil, microfossil, plant, temperature, ocean, "geologic time", Sun, continent, "plate tectonics", "ocean current", climate, polar, landmass, "ice sheet"
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