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.

What we're still learning about how trees grow

What will happen to the world's forests in a warming world? Will increased atmospheric carbon dioxide help trees grow? Or will extremes in temperature and precipitation hold growth back? That all depends on whether tree growth ...

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