Everything around us is made of 'stuff', from planets, to books, to our own bodies. Whatever it is, we call it matter or material substance. It is solid; it has mass. But what is matter, exactly? We are taught in school that matter is not...
A history of gravity, and a study of its importance and relevance to our lives, as well as its influence on other areas of science.
Physicists will tell you that four forces control the universe. Of these, gravity may the most obvious, but it is...