What is it that pulls everything from rocks to rockets toward the center of the earth? With the help of an adventurous scientist and his fun-loving dog, you can read and find out about this mysterious force. Let's-Read-and-Find-Out Science Stage 2.
About the Author
Edward Miller has illustrated A Drop of Blood and What Happens to a Hamburger? for the Let's-Read-and-Find-Out Science series. He lives in New York City.