Why are you grumpy after a bad night of sleep? How is it possible that we can hear either ‘green needle’ or ‘brainstorm’ whilst the audio fragment remains the same? How does stress affect your brain? How are memories made in the brain? Are emotions experienced in the heart or the brain? Can you feel pain in your brain? Are there people or animals with more or fewer than two brain hemispheres? Do we only use 10% of our brain? What happens in the brain when you take psychedelics? How is it that some people see an object as blue, while others say that same object is green?