Rhinoceros poaching has reached critical levels, with 448 rhinos poached in South Africa last year, and a new procedure to deter poachers ended in the death of a male rhinoceros Thursday. The private Rhino & Lion Nature Reserve in Pretoria, South Africa, sedated some 20 rhinoceroses and infused their horns with a dye that can be tracked by authorities and an insecticide that causes vomiting and other problems in people. The animal that died, in its mid- to late-20s, could not be revived after being anesthetized for the procedure.

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