The Amazon's largest dam is nearly complete. But the social and environmental costs of huge hydropower projects are just not worth it.
Birds don’t fly across wide Amazonian rivers like the Rio Negro.
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Rivers are natural boundaries for evolving populations. But scientists don't agree whether they create new species or just help maintain them. Research using birds' molecular clocks provides some answers.
A mythical Amazonia of lost tribes or lost cities is easy to challenge on a factual basis, but such objections appear rather feeble in the face of the power of cliché.
The history of the rubber 'boom' reveals why.
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Promises to consult with indigenous groups are routinely ignored as Peru eyes up the natural resources found in its rainforests.
Remote tribes are supposedly safeguarded by a UN declaration, yet a recent alleged mass murder shows they are still vulnerable.
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Brazil claims mining and logging will boost the economy and help it protect the environment. But there is little evidence this works.