Amazon.com description: Product Description: Explore the fascinating history of physical science! What are matter, motion, gravity, electricity, magnetism, and substances? Who first studied these concepts and why? And who built upon those early theories to take scientific understanding further? Fascinating timelines provide a visual representation of how physical science concepts developed over time. The intriguing stories that follow show the connections between scientists and explain how theories were built upon or completely overturned by a new discovery.