Has an animal saved your life? Studying Arctic birds helped resuscitate those suffering from hypothermia. An ECG on the 150kg heart of a humpback whale has extended the lives of patients with heart failure. Understanding giraffes´ long necks has led to improved asthma treatment. Learning how animals survive and thrive has led to life-saving advances for human health. But we still have a long way to go. Intensive care doctor Matt Morgan looks at why animals can be the key to understanding how our bodies work - and how to fix them when they go wrong.