Did you ever wonder why a camel has a hump? If you can really tell the weather by listening to the chirp of a cricket? Or why our joints make popping sounds? These questions deal with everyday phenomena that we often take for granted, but each can be explained scientifically.

Everyday Mysteries will help you get the answers to these and many other of life's most interesting questions through scientific inquiry. In addition, we will introduce you to the Library of Congress' rich collections in science and technology.

All of the questions presented on this Web site were asked by researchers and answered by librarians from the Library's Science Reference Services. Do you have a question for our science librarians? Use our online form to ask your own question.
• Agriculture
• Astronomy
• Biology and Human Anatomy
• Botany
• Chemistry
• Food and Nutrition
• Geography, Anthropology, Recreation
• Meteorology, Climatology
• Motor Vehicles, Aeronautics, Astronautics
• Physics
• Technology
• Zoology