This:
I did a piece a while back for Samizdata about that foolish equation people sometimes still make between “the age of exploration” that happened about five hundred years ago, when Europe, until then a backwater, globally speaking, started to connect itself with the rest of the world out there, and space exploration now. Like I said, rather foolish.
The above is one of the many ways in which space travel, unlike those early sea voyages, is profoundly different from anything before attempted by humans. Not saying we shouldn’t do it. Am saying: watch out for very big surprises, often very nasty ones.
I have had that tweet open for over a month, and it refused to let itself be closed. Too interesting. Too dramatic. Too destructive.