Artificial stingray is 'living robot' - BBC News

Scientists have designed a robotic stingray that could help our understanding of the human heart. The miniature robot, one-tenth the scale of the actual fish, moves using heart cells taken from a rat. Researchers hope the robotic ray will give new insight into the heart's ability to pump blood and its potential implications in heart disease. The research is published in the journal, Science. "It turns out the musculature in the stingray has to do the same thing as the heart does: it has to move fluids," said lead researcher, Prof Kevin Kit Parker of Harvard University, US.