Fans of "The
Economic Naturalist" (see here
for an explanation of the idea behind the book, and here
for a fan’s notes) are always on the lookout for more everyday puzzles along
those lines. So here’s one from Aaron
Schiff:
Why are passenger airplanes flown by airlines usually relatively new while
freight airplanes may be very old?
I’m not completely convinced by Aaron’s answer, but this is on a blog, which
means that of course a commenter adds some useful information about aircraft
design and regulation in the comments.
I think there’s quite an appetite for this kind of question, so do let me know
if you come up with one in the middle of the night.