I was watching an old tv show called Life after People. It’s about how the earth would far if humans suddenly disappeared. What really surprised me is how many things we consider solid or durable markers of our technological advancement, would disappear almost without a trace within a couple hundred years if their weren’t enough humans around to maintain them. It got me thinking, about the possibility of advanced societies in the past that could have been lost in a similar matter. Then you have bizarre archeological finds like the Sumerian battery that just seem to not make sense with the rest of the technology found around it.