As far as we know, the physical laws we observe... on Earth apply everywhere... You can test them for… — Helen Czerski

The basic principles alone often won't provide specific answers, but they'll provide the context needed to ask the right questions. And if we're used to working things out... we won't feel hopeless when the answer isn't obvious...

This book is about linking the little things we see every day with the big world we live in.

You don't have to be a qualified scientist to experiment with the world. Knowing some basic principles will set you on the right track... [I]t doesn't even have to be an organized process...