Are there people or animals with more or fewer than two brain hemispheres? Did the gigantic dinosaurs also have gigantic brains and a gigantic number of neurons? Is there a link between rheumatoid arthritis and anxiety? Why is it easier to learn a language as a kid? How does your brain know that you want to move? Why is some information stored so quickly in the brain, while other information takes much longer? Is dopamine good for you and serotonin bad? Can you unlearn sleeping in the dark? What is the purpose of brain research? Are emotions experienced in the heart or the brain?