How to build something that lasts 10k years
Finland is building nuclear waste storage facility which is planned to last for 100.000 years.There are quite few interesting design decisions to be made taking this lifespan in to account, for example if current civilization will be wiped out, what symbols you should put on a door to discourage someone in future to opening the door.https://en.wikipedia.org/wiki/Onkalo_spent_nuclear_fuel_repo...https://www.youtube.com/watch?v=qoyKe-HxmFk