In 1851, Leon Foucault demonstrated the Earth's rotation to the world with a magnificent pendulum in the Paris Pantheon. In 2010, that pendulum crashed to the Musée des Arts et Métiers' marble floor. The damage, as they say, is irreparable.
Stressed-out scientists can now relax with the Sandpendel, a mashup Zen sand-garden/physics-experiment desktop toy. Designed by Jürg Näf, the Sandpendel is based on Léon Foucault's famous 19th-century experiment that demonstrated the Earth's rotation. Details, plus another pic, are below.