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In this Thursday, Feb. 23, 2012 photo, a worker gives a cardiac ultrasound to 9-year-old orangutan named Satu, at Zoo Atlanta, in Atlanta. A groundbreaking national project housed at Zoo Atlanta is researching heart disease in orangutans through the world’s first awake ultrasounds on the rust-colored apes. (AP Photo/Dorie Turner)

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Tease photo

Orangutans sit still for heart ultrasound at zoo

Orangutans aren't known for their patience, but this one, named Satu, has been trained to let researchers at Zoo Atlanta perform echocardiograms on him while he's awake.

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