I’ve just finished reading The Salmon of Doubt, a delightful copendium of writings and interviews of the late Douglas Adams.
In the beginning of one essay Adams claims to have a favorite piece of information. He describes it thusly:
I got to wondering if I had a SINGLE favorite piece of information, and found it hard to nail down. Not because I know very many - rather I’d just never thought to rate them. But my current favorite is this:
The SR-71 Blackbird spy plane leaked fuel on the ground. But when flying at speeds above Mach 3 the air friction heated up the airframe, causing it to expand and seal the leaks. I think that’s pretty cool.