The Tevatron shut down yesterday. Before its duties were taken up by the the Large Hadron Collider, it accelerated highly charged particles through 4 miles of electromagnetic coil and vacuum tubes to discover the secrets of the universe. How do you turn a beast like that off?

Two buttons, both specially designed for the express purpose of saying goodbye to this once-great monster machine. The first, labeled BEAM, shut down the particle beam, and the second, labeled RAMP, killed the power. Surprisingly simple. [Slate]