When are we able to solve MS? Do colours appear the same to everyone? What is fainting? What happens in the brain when you take psychedelics? Is dopamine good for you and serotonin bad? Why is it easier to learn a language as a kid? Can you feel pain in your brain? What happens in the brain with ALS? Can a brain scan show whether people are already producing their language response while their conversation partner is still speaking? How is a neuron made?