Our particle universe.

Ever since the discovery of the electron more than 100 years ago, scientists have asked the questions -'what is our universe made of?' and 'why is the universe the way it is?' Not long before, it was found that these two questions are related to each other. The interactions of particles in the universe determines its evolution, its very form, and existence. In this article, we will trace the discovery of some of these particles, learn about their interactions, and try to understand their properties such as electric charge and mass. [ABSTRACT FROM AUTHOR]