What effect does cyanide have on the brain? Is the brain more or less active during sleep? How is it that some people see an object as blue, while others say that same object is green? How does your brain know that you want to move? How does personality arise? And does it change over the course of your life? Are emotions experienced in the heart or the brain? Is there a link between rheumatoid arthritis and anxiety? What happens in the brain when you take psychedelics? Why do some people remember their dreams and others do not? How are memories made in the brain?