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2019-10-30 no comments

Earlier this year, while flying over northern Botswana, Vanessa Hayes looked out over the Makgadikgadi Pans—giant salt flats that stretch for more than 6,000 square miles. They are the remnants of what was once Africa’s largest lake. Hayes could see traces of the lake’s shoreline from the air. She glimpsed massive fault lines running across its former bed—signs […]