We tend to daydream when we are bored — we begin making scenarios in our heads. Daydreaming can be used as an escape from reality, stress and pressure. There's a part of our brain called the default mode network, it's only lit up when there is nothing keeping the brain busy or active.

Do you ever notice how you feel awake and energized when going outside and being in the sunlight, but find it difficult to fall asleep when the lights in your room are on? Light and its intensity play a large role in our lives, whether it's artificial or natural light.