Do we really have a reptile brain, a mammal brain, and a human brain inside our heads? Why do some people remember their dreams and others do not? Why is sleep so essential? How does music affect mental health? How is it that some people see an object as blue, while others say that same object is green? Does a 14T MRI scanner make more noise than a 3T MRI scanner? Do we only use 10% of our brain? How does your brain know that you want to move? Can you unlearn sleeping in the dark? Is there a link between rheumatoid arthritis and anxiety?