Learn how veterinarians harness the power of human medical innovations to treat some of the rarest animals on the planet. Tiara is an Amur tiger, one of just 500 left in the world. When she has a nosebleed, vets at Brookfield Zoo in Chicago can turn to a CT scanner like you'd find in one of our hospitals to help them find out what's wrong. The machine has been adapted for animals, although not all of them are as big as Tiara. This high-tech piece of diagnostic equipment means Tiara can be given a clean bill of health without the risk of invasive surgery.