What if scientists had no firm idea what makes up most of the universe? Well, they don't. The dark matter problem (only 5% of the universe is assuredly composed of stuff like us) is one of the most fundamental and profoundly difficult to solve problems in the history of science. Not knowing what makes up most of the known universe goes to the heart of our understanding of the Universe and our place in it. In Search of Dark Matter is the story of...