Chantek, a male Bornean orangutan who learned more than 150 words of sign language and grasped concepts of money and work-exchange in research programs carried out in the 1980s, is undergoing a progressive therapy programme to counteract symptoms of heart disease at Zoo Atlanta (USA). Chantek is 38 years of age and has lived at the zoo since 1997. For more, visit http://ift.tt/2djtfhr http://ift.tt/2dqJ16c
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