Hollow rock turns into a router full of survival info when you build a fire beside it
by Cory Doctorow from on (#12HGT)
Keepalive is Aram Bartholl's fake hollow boulder in the woods of Neuenkirchen, Germany. It conceals a thermoelectric generator that powers a router configured to serve documents related to wilderness survival. The router switches on if the rock is sufficiently warmed, say by a blazing campfire adjacent to it. (more")