Brian Clegg has made a fun list of facts about air travel for The Guardian.
When Concorde flew, the sky appeared much darker outside as it cruised half as high again as current planes, where thinner air produces less scattering.
One of my biggest regrets is to never have flown that bird.
And yes, he's right, you can't cure jet-lag. Or if someone finds how, she or he shall become very rich.
(captain's hat tip: Mayel de Borniol)