Acai berry craze: boon or threat for the Amazon?

Working in the sweltering heat of the Brazilian Amazon, Jose Diogo scales a tree and harvests a cluster of black berries: acai, the trendy "superfood" reshaping the world's biggest rainforest—for better and worse.

Biogeochemical insights from a major Amazonian river

Rivers provide water to billions of people and are critical linkages between continental ecosystems and oceans. Every run and every riffle reshape the surrounding landscape as a river transports nutrients and sediment downstream. ...

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