A True Book: Gravity

This book describes what gravity is, the history of its study, and its effects.

Why was Galileo put in jail for his writings about gravity?

The Pope was angered by Galileo’s work proving that Earth was not the center of the universe.

inside you’ll find:

* Why gravity keeps us from floating into outer space;

* A timeline, photos - and how gravity works on other planets;

* Surprising TRUE facts that will shock and amaze you!