Where do numbers come from? Can speed affect the passage of time? What is dark matter?

Find out the answers to all these questions and many more. The Pocket Knowledge Guide: Science and Math contains fascinating facts and helpful explanations of all things math and science, from the early history of numbers right up to the most recent discoveries in astrophysics. Filled with easy-to-understand breakdowns of complex concepts, it is the perfect way to expand your mathematical and scientific horizons. Subjects include algebra, geometry, trigonometry, atoms and elements, subatomic particles, cosmology theories, and infinity.