When possible, I try to find a theme for the Wednesday Wow posts. Last time, for instance, the theme was aviation and fireworks (two things you wouldn’t normally think went together, but in one case they delightfully did).
The problem is that I’m jaded and have seen a lot, so I can be hard to impress. Not lots of things raise to my highest rating, Wow! Fortunately, I’m not so far gone I can’t still see a world filled with wonder, some of which drops my jaw.
The theme, such as it is, concerns measurements, especially tiny and precise ones. Like, for instance, Planck Length tiny.
I have always liked those comparisons that try to illustrate the very tiny by resizing it to more imaginable objects. For instance, one says: if an orange were as big as the Earth, then the atoms of that orange would be a big as grapes. Another says: if an atom were as big as the galaxy, then the Planck Length would be the size of a tree.
In the last week or so I read an interesting pair of books: 
Logos con carne 