I went to Body Worlds 2 this week. (One of the many joys of voluntary unemployment! Highly recommended.)
The exhibit was just the right length. It took me two and a half hours to work my way through it, it was so interesting, but by the end, I was getting fatigued. I wouldn't have wanted it to be any longer.
One of the displays showed a child cadaver's thymus, and explained that this significantly sized organ gradually decreases in size, and becomes absorbed by the surrounding tissue in the bodies of adults. Cool! There's an organ that children need, that disappears when you become an adult!
But do I still have my thymus? I had to know. Wikipedia gives me the impression that I still have the vestiges of my thymus.
Oh, little disappearing thymus. How little I knew thee.
Body Worlds is highly recommended. Everybody there learned something. Strangers struck up conversations with each other because the exhibits were so instructive and fascinating.