I Have Discovered The Physiological Source of All Happiness!
I've always wondered why I was so silly. Then yesterday, while looking through a copy of my 2009 brain MRI, I was shocked to find my inner smiley face staring right back at me!
This is a completely unretouched copy of what I saw (even though I really really wanted to tint the little smiley face's nose red).
So there you have it. The next time someone tells me to get serious and quit joking around, I'll just show them this picture, and explain that doing so would be a physical impossibility.