Quick translation: 1) Researchers found neurons that are active in one context (say, mice are in a blue cage). 2) They use a genetic tool to target these neur

Quick translation: 1) Researchers found neurons that are active in one context (say, mice are in a blue cage). 2) They use a genetic tool to target these neurons and make them sensitive to light 3) The researchers then deliver mild foot shocks to the mice, while activating these neurons 4) Mice are put back into the original context (blue cage), and exhibit behaviors associated with expecting foot shocks. Makes sense, nothing too surprising but getting something like this to work is impressive. *edit for clarity