Why is it easier to learn a language as a kid? Can you unlearn sleeping in the dark? What is the effect of a visual impairment on the brain? And is there anything we can do to restore it? How is it that some people see an object as blue, while others say that same object is green? Why is some information stored so quickly in the brain, while other information takes much longer? What happens in the brain when you take psychedelics? Why do some people remember their dreams and others do not? How is a neuron made?  Is the brain more or less active during sleep? Are computers smarter than humans?