What if you could see inside someone’s mind? It’s not possible to know exactly what another person is thinking, but neuroscientists from UCSD and UCSF are on their way. They created a “glass brain”: software that shows a person’s brain reacting to stimuli in real time. The implications for virtual reality and digital communication are tremendous, according to Philip Rosedale, the founder of Second Life, who has been collaborating with the neuroscientists.