What happens in the brain when you take psychedelics? How is a neuron made?  Are there people or animals with more or fewer than two brain hemispheres? What is fainting? How heavy was Einstein’s brain? Does the size of your brain say anything about intelligence? Why do some people remember their dreams and others do not? Do colours appear the same to everyone? Can brain implants read and control our minds? Did the gigantic dinosaurs also have gigantic brains and a gigantic number of neurons? Are computers smarter than humans?