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Microbe Safari II: Geyser Creek

This microbe safari is risky business. We are an hour’s bush-whacking off the trail, in the Yellowstone back-country, amid a field of geothermal pools. Most of the pools are at or near the boiling point. Some are alkaline, while others are as sour and corrosive as stomach acid. There was danger in nearly every step. The […]


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