Corte Madera store
Order a signed copy
Richard Panek talks about The 4 Percent Universe: Dark Matter, Dark Energy, and the Race to Discover the Rest of Reality ($26.00). Only four percent of the universe consists of the matter that makes up humans, the planet, and every star. The rest is completely unknown. Panek tells the dramatic story of the quest to find this dark matter and an even more bizarre substance called dark energy.