Why do brain tissues have different colours? What is the purpose of brain research? What happens in the brain when you take psychedelics? What effect does cyanide have on the brain? How does music affect mental health? How does stress affect your brain? How is it that some people see an object as blue, while others say that same object is green? Can you feel pain in your brain? Why do people still receive electroshock therapy? What is the effect of a visual impairment on the brain? And is there anything we can do to restore it?