Can I learn from a text by listening to it while I sleep?  What effect does cyanide have on the brain? Why is it easier to learn a language as a kid? What is already known about long covid and the brain? Do colours appear the same to everyone? Why do some people remember their dreams and others do not? Are emotions experienced in the heart or the brain? Why is some information stored so quickly in the brain, while other information takes much longer? How is a neuron made?  Do we only use 10% of our brain?