Quote (Azrad @ Jul 23 2013 02:19am)
That is certainly not true, mass is not conserved in nuclear reactions (for example).
Quantum mechanic (specifically QED) is the most highly tested theory of all time. It is generally referred to as "the jewel of physics". It's fine to be skeptical, but remove it and it will take just about everything else with it.
Maybe I should of used the word "energy" not matter.