  We show that the spatially homogeneous and isotropic evolution of a
macroscopic Coulomb system of identical particles obeys equations that have the
structure of the cosmological equations of the general theory of relativity.
There is a Hubble law, and the background charge (if present) mimics the effect
of a negative cosmological constant. Specifically, Coulomb explosions mimic the
non-singular open cosmologies in negatively curved spaces, while breathing
modes in conductors model oscillatory universes including the anti-de Sitter
space.
