Flies and heart pacemaker research
{"Image ImageDescription": "Flies and heart pacemaker research. Illustration of a laser-controlled experiment being carried out on the heart of a fly at different stages of its development. The laser (blue beam) is used to trigger a light-sensitive protein that controls the rhythm of the heart. This research may eventually lead to less invasive pacemakers in humans.", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image YCbCrPositioning": "Centered", "Image Copyright": "Science Photo Library"}