Facts

David Macaulay wrote and illustrated a book entitled Castle. If you have a child four or older, you have a perfect excuse to buy it. Mill is fascinating, too.

That “if Microsoft designed the iPod package” video was commissioned by Microsoft. To my mind, that makes it even cleverer.

In an underground passageway somewhere near Shinjuku, there is a machine that cleans your glasses.

A hot-air balloon that can carry 8 people costs “all your money”. Or if you prefer, about a hundred thousand dollars.

You can write a regular expression that matches only strings of a composite number of x's. (Hint: Too easy for a hint.)

I knew that Galileo discovered the first four of Jupiter's moons, the Galilean moons. I didn't know that the fifth known moon wasn't discovered until almost 300 years later, when Tennesseean E. E. Barnard discovered Amalthea.

And it took me completely by surprise to learn that Richard Feynman ever worked at a computer hardware startup, Thinking Machines Corporation.