Radioactive waste takes a long time to decay.
In the meantime, you have to warn people to stay away from it. But how do you make a warning sign that will still be understandable to people 10,000 years in the future?
UWA linguist Daniel Midgley examines the problem of Yucca Mountain on this episode of Talk the Talk.
Listen to this episode
What the experts came up with: (Long PDF)
A shorter summary of what the experts came up with:
Some info on radioactive waste, including how long it takes to decay: