Animation (4.7MB QuickTime) showing WMAP's "baby picture" of the Big Bang through the clumping and ignition of matter (which caused reionization) up to the present. (Words and animation from the WMAP website.)
Animation of gravitational instability (8.0MB mpeg). Simulation box is 630 Mpc across and follows 1 billion cold dark matter particles. From J. Dubinski, CITA.