The real question a new study suggests, isn't why some people occasionally experience hallucinations: It's why all of us aren't hallucinating all the time.
A study in Nature details a discovery with potential clinical significance for treating eating disorders such as anorexia. To make that discovery, Stanford researchers had to develop a "first-time-ever" way of teasing apart two separate but closely intertwined sets of identical-appearing neurons in the brain.
Researchers have made a molecular movie showing how retinal changes shape when hit by light. Retinal is critical to vision and many other light-driven processes.