We need to discuss the Midterm Results : histogram

Prelude

Have you ever played with magnets?

Our Sun, and its surface. (“photosphere”).

Medical scanners : MRI scanner produces ‘images;’ a full body scan.
(Here's an article in NYT on a newish MRI scanner.)
We can go on a trip head-to-toe too, and here are some photos from it.
(From the Visible Human Project.)

Hoops : jumping and not. (A demo.)

The question: What do these have in common?