How are memories made in the brain? How does stress affect your brain? When are we able to solve MS? Is there a link between rheumatoid arthritis and anxiety? Can you unlearn sleeping in the dark? Can I learn from a text by listening to it while I sleep?  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? How do brain cells communicate with each other?