It's a fact: when feelings of happiness are due to biochemical messenger substances in the brain. These include the hormone dopamine. It's released by our brain and nerve cells when we experience something pleasant.
Do you ever think you've seen a ghost and get scared? Wasn't it the rustling of curtains in the wind? We know it's totally irrational, but there's little we can do to stop the fear. Where does the feeling come from?
Many of us make New Year's resolutions to get into better shape, maybe by joining a gym or starting running. All too often, we don't last the distance, and a mouse study might yield clues as to why.
Even if it is difficult to admit it, the human being is in a way still just an animal. An animal with needs and impulses – controlled by hormones, nerve reflexes and instincts.
Baking cookies, drinking mulled wine, or listening to Christmas music - all these things enhance our anticipation of Christmas. But why does Christmas keep bringing a smile to most of our faces?
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