Building a telegraph out of stone-age materials - Boing Boing

In this episode, artist Jamie O'Shea from Substitute Materials shows how you can build a telegraph from materials that were readily available 50,000 years ago: "It's the ultimate salvagepunk experiment, a DIY exploration of what makes innovation possible, and an attempt to prove that the future could happen at any time (even if the world isn't always ready for it)."
featured by Cory Doctorow