This image shows a rat with a light beam going into its head.

Shining a Light on Memory

Using optogenetics, researchers have been able to inactivate and then reactivate memory in genetically engineered rats.
This image shows gamma waves behind a purple brain.

How Brains Remember and Correct

Researchers detect brief bursts of neural activity oscillating in two specific areas of a mouse brain just before the animal makes a correct choice, either when planning an action or correcting a mistake.