Science: In Brazil

The coppery cannibal Indians of upper Brazilian Guiana, squatting at their fires, their poisoned arrows handy on the ground, are not perturbed when a cobra slithers into camp, or a scorpion stings a foot, or a stream of venomous winged ants pours out of the jungle to dispute possession of the clearing. They are used to these annoyances, and could themselves be annoying if you should ascend the Parima River to its source and find them at home, before they have made their annual pilgrimage over the Sierra Parima to the Orinoco Basin in...

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