What is already known about long covid and the brain? How does stress affect your brain? Is there a link between rheumatoid arthritis and anxiety? How do brain cells communicate with each other? Why is sleep so essential? How is it that some people see an object as blue, while others say that same object is green? Why do people still receive electroshock therapy? Do the male and female brain differ? Why is it easier to learn a language as a kid? Does a 14T MRI scanner make more noise than a 3T MRI scanner?