Congratulations Karl Deisseroth, Peter Hegemann and George Nagel, awarded the Nobel Prize in Physiology/Medicine for their pioneering work in light-gated ion channels and optogenetics. Their work established the use of light-sensitive proteins to control specific cells' activity with light, establishing a foundation for optogenetics. Optogenetics gives researchers the ability to switch selected neural circuits on or off with light with high spatial and temporal precision. As a powerful tool in the study of neural activity, optogenetics has revealed the mechanisms behind circadian rhythm, social behaviors and more. #NobelPrize #Optogenetics #Medicine #Neuroscience [Image credit: Photograph of Karl Deisseroth, Christopher P. Michel Photographs of Peter Hegemann and Georg Nagel: Millencolin, CC BY-SA 4.0 via Wikimedia Commons]