Orangutans sit still for heart ultrasound at zoo

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)

April 20, 2012 6:08:00 AM PDT
The 9-year-old patient sits still, munching on popcorn and sipping grape juice while he gets an ultrasound of his heart.