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May-Britt Moser is a Norwegian neuroscientist and winner of the 2014 Nobel Prize in Physiology or Medicine for her work on the positioning system in the brain. Moser and her husband, Edvard Moser, have studied the hippocampus, a brain region involved in memory and spatial navigation. They discovered that the hippocampus contains a grid-like system of neurons that helps animals and humans to navigate their environment.