A plump guinea fowl walks across a bird-sized treadmill. X-rays record the precise movement of the bird's bones, tracking its hips as they interact with its legs. A computerized model of the bones is ...

As a zoo and wildlife veterinarian, I sometimes take care of penguins – both in the wild and in aquariums and zoos. I’m always fascinated when I have to take X-rays of an injured bird that might have ...

For thousands of years, the Hawaiian petrel has soared over the Pacific Ocean, feeding on fish and squid. Now, using evidence preserved in the birds’ bones, scientists at the Smithsonian’s National ...