![[Image: 400pxrelativity3walkofi.jpg]](https://images.weserv.nl/?url=img146.imageshack.us%2Fimg146%2F9379%2F400pxrelativity3walkofi.jpg)
Not only for practical applications but also because it's quite amazing to know that a small amount of mass can contain such an incredible amount of energy. The energy in a paper clip, for example, is great enough to make it into an atomic bomb which would cause an explosion that is roughly equal to the size of the Hiroshima explosion (18 kilotons of TNT). I find this equation to be the most beautiful because it describes what goes on in the stars and so many things around us and because it shows us the connection between two of the most fundamental things in the universe which are matter and energy.
