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Best known for revealing how the brain builds an internal map of the world, this Nobel Prize-winning neuroscientist helped transform the study of memory and navigation. His work on “place cells” opened a new way of thinking about how we know where we are.

by John O'Keefe
Born in New York City in 1939, he went on to build his career in the UK and became a leading figure at University College London. His research focused on the hippocampus, a brain region central to memory, and helped explain how animals and humans represent space.
He is most famous for discovering place cells — neurons that become active when an animal is in a particular location. That finding became a cornerstone of modern neuroscience and played a major role in the 2014 Nobel Prize in Physiology or Medicine, which he shared with May-Britt Moser and Edvard Moser.
Alongside his scientific papers, he also wrote for broader audiences about memory, space, and the mind. His work remains influential because it connects deep biological research with one of the most familiar human experiences: finding our way through the world.