The brain is constantly changing as it perceives the outside world, processing and learning about everything it encounters. In a new study, which will be published in an upcoming issue of ...

Hallucinogen persisting perception disorder (HPPD) is a rare medical condition that can cause visual disturbances (sometimes called flashbacks) if you’ve taken hallucinogenic drugs in the past. With ...

Forbes contributors publish independent expert analyses and insights. Leadership Strategist Dan Pontefract covers leadership and culture. If you’re looking to solve problems more effectively, the key ...