Why Are We Using Radioactive Materials?

iCauun: How can you make amessage that a human will understand ten thousand years from now? The logic seemed to be, well, if we told them to design a marker to last 250 thousand years, that's clearly a ridiculous and absurd proposition. So it was just pulled out of the air. In other words, even though this sight is going to be radioactive for hundreds of thousands of years, this panel was only responsible for keeping this place sufficiently labelled for humans for the next ten thousand years. Let's get some perspective. Think about where manity was ten thousand years ago. Back then there was a hot new technology taking the world by storm. It was called farming.