Mystery #4Tier 2the brain / mood
Why does a really good laugh leave you feeling wonderful?
You get the giggles with a friend and simply cannot stop. Your tummy aches, you can barely breathe, and afterwards you feel light, warm and happy, as if a weight has lifted off you. Nothing about your day has actually changed. So how can a fit of laughing leave you feeling so wonderful?
Your guess
What do you think a good laugh does inside you to lift your mood?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.