Wikipedia: Dark Matter Feature Summary

Type:
Worth a Look
Title:
Dark Matter
Description:
Imagine a universe where physicists understand only a small percentage of the matter in it--that's the situation today with the Missing Mass, one of the great unsolved questions in physics.  For a discussion of the observations that led to this challenging situation, visit the Wikipedia entry Dark Matter.
Featured:
September 1, 2008 - September 16, 2008