I suggest you read answers in Physics SE, some of them are very well written with the general audience in mind. * For the question of why the speed of light ha

I suggest you read answers in Physics SE, some of them are very well written with the general audience in mind. * For the question of why the speed of light has the value it does see the excellent answers in http://physics.stackexchange.com/questions/56973/why-does-the-speed-of-light-c-have-the-value-it-does http://physics.stackexchange.com/questions/56973/why-does-th... and http://physics.stackexchange.com/questions/3644/the-origin-of-the-value-of-speed-of-light?lq=1 http://physics.stackexchange.com/questions/3644/the-origin-o.... Turns out, it the actual values is irrelevant, in fact c is set to one in regular work. * On the question of why c is so special, see http://physics.stackexchange.com/questions/80365/what-is-so-special-about-speed-of-light-in-vacuum http://physics.stackexchange.com/questions/80365/what-is-so-... * Many people don't recognize that in modern physics c is not a measured constant, its value is set: http://physics.stackexchange.com/questions/92969/why-does-the-speed-of-light-in-vacuum-have-no-uncertainty/92971#92971 http://physics.stackexchange.com/questions/92969/why-does-th...