A method that controls nerve signals with light, developed by an American and two Germans, has provided greater understanding of Alzheimer’s and is used in efforts to restore sight. Three scientists honoured for research that probes origins of memories, feelings and behaviours — and could help restore sight Key points and original sources are listed below.

• A method that controls nerve signals with light, developed by an American and two Germans, has provided greater understanding of Alzheimer’s and is used in efforts to restore sight.S1

• Three scientists honoured for research that probes origins of memories, feelings and behaviours — and could help restore sightS2