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The Snowball Earth Hypothesis - Atmospheric and Oceanic Sciences

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300Vostok CO 2 (ppmv)2752502252001750 5000 10000 15000 20000 25000Figure 4.4d. Variation of CO 2 (ppmv) at Vostok, Antarctica over the past 25,000 years[Petit et al. 2001; data from www.ncdc.noaa.gov/paleo].

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