Why are some memories more memorable than others? Why don't you hear when someone is talking to you sometimes? Can you tell how sour something is without tasting it? These questions and many more are answered for readers of this fun book of experiments, presented by Scientific American! Each of the 10 experiments in the book have clear, step-by-step instructions for completing them, supplemented by background information that highlights the science concepts at work. Whether looking for a science fair project idea or to have some fun with science at home, the projects in this volume are the perfect fit!