content: Setting it up for 100 years was probably due to the fact that we will likely have a much better way to shield it by then that will be cheaper and more thoroughly contain it probably for longer as well instead of trying to shield it forever now. Plus with all those cultures everyone had an interest in not being killed so maintaining this as long as everyone in 100 years knows what is under it. This isn't being build by Time Capsule Manufacturing with their name on it in big letters and an expiration date as well is it? Because other then being a dick move, I will be dead by then and won't be able to laugh when they open it.