How Science Works: The Facts Visually Explained (DK How Stuff Works)This visual guide is packed with amazing diagrams and infographics to answer all your burning scientific head scratchers from gravity and black holes to earthquakes and gene therapy. In How Science Works you will find the most fascinating phenomena in the Universe visually explained, from pulleys to string theory, light to lasers, and chemical reactions to artificial intelligence. If you have ever wondered why the sky is blue, how a black hole works,