Robert Gardner

How do humans perceive time? What are the three different kinds of days? What is a shadow clock and how does it work? Using easy-to-find materials, you can conduct these fun and simple experiments to learn about the science behind time and how it has been measured throughout history.

"Details science experiments with animals, including explanations and data"--

"Details science experiments about the stars with explanations"--

"Presents several forensic science experiments using trace evidence. Includes science project ideas and crimes to solve"--Provided by publisher.

Presents science projects and experiments related to sports, covering such topics as speed, Newton's Laws, force and motion, gravity, friction, and collisions.

Provides step-by-step instructions for a variety of projects involving the sky, and answers such questions as "Why is it blue?" and "How do clouds form?"