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Volume I, on mechanics and thermodynamics, is presented in more detail here. With almost no formulae, it tells about the many wonders of everyday life.

Volume II, on relativity and cosmology, is presented here. It presents relativity as simply as possible, with all its paradoxes and surprises.

Volume III, on electromagnetism and the brain, is presented and summarized here. Enjoy the basis of electricity and the importance it has in everything around us.

Volume IV, on quantum physics, is presented here. Learn about Planck's astonishing discovery, and about its incredible consequences.

Volume V, on biology, technology and astrophysics, is presented here. It explores the fascinating types of motion found inside matter.

If you want to experience why physics, the science of motion, is so fascinating, think about the story of the atoms and molecules in your body: the hydrogen atoms formed in the big bang, the carbon in some star that exploded long before the Sun formed. The water molecules were collected on Earth from comets that crashed onto our planet long before life formed. And if you want to know what is so fascinating about motion around us, watch the videos on this page.

The volumes are written in such a way as to increase the passion for the exploration of physics. Each volume presents the most interesting facts known about the specific topic. They are written to be enjoyed.

If somebody tells you that physics is boring, tell him to read this textbook. The volumes are written to change his or her opinion.

If you want to contribute images, drawings, films, animations, stories, puzzles, surprises or corrections, that is great! Please send an email to The material you send will be used. If you want to help translating the welcome page or a part of the physics textbook into your language, please get in touch. We will find a way to reward what you do. More details are given here.