One of the greatest mysteries in the cosmos is that it is mostly dark. That is, not only is the night sky dark, but also most of the matter (and the energy) in the universe is dark. For every atom visible in stars and galaxies today, there exists at least five or six times as much “Dark Matter” in the universe. Astronomers and particle physicists today are seeking to unravel the nature of the mysterious but pervasive dark matter which has profoundly influenced the formation of structure in the universe. I will describe various attempts to probe dark matters by direct and indirect means.