This is back from 2000. Â I still think about this every now and then and thought I’d post it (or re-post it):
Postal Experiments from the Annals of Improbable Research. Â Experiments include trying to send all sorts of objects (including a $20 bill in a clear envelope, to a ski, to a deer tibia) through the US Postal Service to see what gets delivered and what doesn’t.