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Prolonged droughts likely spelled the end for Indus megacities

New research involving Cambridge University has found evidence—locked into an ancient stalagmite from a cave in the Himalayas—of a series of severe and lengthy droughts which may have upturned the Bronze Age Indus Civilization.

Planet Earth: 8 billion humans and dwindling resources

Are eight billion humans too many for planet Earth? As we reach this milestone on November 15, most experts say the bigger problem is the overconsumption of resources by the wealthiest residents.

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