Why is the universe becoming warmer? What are imponderable fluids? Is it possible to build a perpetual motion machine? How much energy is in a potato? What is a colorie? What was the Big Bang? Find the answers to these and many other questions in this fascinating new look at the story of enertgy. Superb full-color photography of original equipment, intricate scientific instruments, 3-D models, and revealing experiments brings to life the ideas and discoveries that have changed our perception of the universe. Hard cove 64 pages. |