Is the brain more or less active during sleep? Why is it easier to learn a language as a kid? Are computers smarter than humans? What happens in the brain when you take psychedelics? Do we only use 10% of our brain? How are memories made in the brain? What effect does cyanide have on the brain? How does music affect mental health? What is the ‘brain freeze’ sensation when eating or drinking something cold? Why do some people remember their dreams and others do not?