RIO DE JANEIRO, BRAZIL - To control the "uncontrolled" growth of hippopotamuses in Colombia, environmental agencies developed the first immunocastration test on 24 specimens living in the Magdalena Medio region, descendants of Pablo Escobar's zoo.
The captured hippopotamuses were injected with GonaCon, a drug from the Animal and Plant Health Inspection Service (Aphis) of the United States Government (USDA), donated to the Corporación Autónoma Regional de las Cuencas de los . . .
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