Pablo Escobar’s hippos might be filling an ancient ecological niche ...Middle East

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Pablo Escobar’s hippos might be filling an ancient ecological niche
Some ecologists think these hippos may have happened upon a valuable niche once occupied by semiaquatic hoofed mammals that roamed South America 100,000 years ago. (Jacqueline Oakley/)In 1981, notorious drug lord Pablo Escobar imported four hippos from Africa to his estate near Medellín, Colombia. After his death in 1993, the herd meandered into the nearby Magdalena River. Ecologists estimate there are now 65 to 80 swimming around, and that number could reach 800 by 2050.Introducing new species often causes environmental mishaps. Toads released to eat crop-loving beetles took over Australia, and ivy brought to the New World for decoration has toppled native trees. But some ecologists think

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