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Earth took 10mn years to recover from mass extinction: Study
It took about 10 million years for the Earth to recover from the greatest mass extinction which has nearly wiped out life some 250 million years ago, a new study has suggested. Scientists have long...
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Dead zone pollutant grows despite decades of work. But who’s the culprit?
For two centuries, the town of Hermann has been known for the Missouri River. But now the river is making Hermann known for an unexpected reason: It is a hot spot for nitrate. Despite three decades of...
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