swetzel9 's review for:

The 4% Universe: Dark Matter, Dark Energy, and the Race to Discover the Rest of Reality by Richard Panek

4.0

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Does a really good job of not just explaining what Dark Matter is and why it matters, but also traces the history of the subject within astronomy. So in addition to the physics and science, you also get the scientists and the rivalries that have worked on the subject over the years.