Researchers have developed a way of growing realistic human tissues outside the body. Their 'person-on-a-chip' technology, called AngioChip, is a platform for discovering and testing new drugs, and could eventually be used to repair or replace damaged organs. Prof. Milica Radisic, graduate student Boyang Zhang and the rest of the team are among those research groups around the world racing to find ways to grow human tissues in the lab, under conditions that mimic a real person's body.