A movie about the invisible matter in the UniverseDownload (use rightmouse click):
and how we know it is there if we cannot see it.
IMPORTANT - if you use the AVI file:
If you can not see the movie (but you can hear the sound!) then you probably do not have DivX Codec (compression) installed on your computer. You can install it for FREE: go to www.divx.com/divx, click on "download divx" and follow the instructions (it takes just a couple of seconds to complete the installation)
Authors: Dejan Vinkovic, Moshe Elitzur
Animations are created with POVRay
Music used in the movie: "Driving to Gogo" by At