Comment Make a living capsule... (Score 1) 465
The problem with burying a time capsule is that it works for dead items, but does not work well for something which is supposed to work when you resurrect it.
Why not encrypt your message, spread it around on the surface, freely, and just bury the key in your capsule? For more fun, encrypt it with just enough encryption so that the time it takes to crack it is equal to the time capsule length.