Do we only use 10% of our brain? Why are you grumpy after a bad night of sleep? Can you unlearn sleeping in the dark? How are memories made in the brain? What is already known about long covid and the brain? How does our brain create a 3D world? Is this possible with just one eye? Is the brain more or less active during sleep? Do you learn faster when you’re younger? Why (not)? Did the gigantic dinosaurs also have gigantic brains and a gigantic number of neurons? Do some people have stronger mental imagery than others? And does this affect how they learn?