How can something that grounds us and keeps us here on this earth be so invisible and mysterious? We’re not talking about anything abstract and undetectable.

Audisee® eBooks with Audio combine professional narration and text highlighting for an engaging read aloud experience! The earth is round, so why don't some pe

What would happen if gravity didn't exist? People and objects would float into space! With this basic introduction to gravity, young readers will discover how g

"The earth is round, so why don't some people hang upside down? The answer is gravity! Young readers can explore the concept of gravity with vibrant, full-color

Gravity is the most immediately familiar of the four fundamental forces of nature, and its effects dominate many of the phenomena commonly observed. Timothy Cli