[RightWhale]

I am about 40% through the book. Learning a lot even if Penrose is about ten grade levels above me.

[LeGrande]

On page 205, Penrose illustrates a spinoral object. I find myself repeating the illustration every time I have a belt or a ribbon in my hand. It is like a light bulb went off, similar to when someone pointed out that the earths orbit is a sine wave.