What's really the point of Einstein's theory of relativity? You want to know? It's all pointing out to that word "relativity." Define it's meaning and that's the answer, no need to have that mind boggling formula or equation.
Could be a trick!?
Energy is matter and it occupies space. Double that matter. Be there or be squared.
So what is doubled mc?
It's called magnetic cores. Magnetic cores are tiny doughnut-shaped objects of magnetic materials that supply about one million numbers in a second then double that one million numbers in a glance. Yep, it's COMPUTER. Computers have that power to magnetize you and your vision. TELEVISIONS have that kind of magnetic power too. You think the stars are the ones attracting you to focus your attention through your electronics. YOU as human beings have magnetic cores too and when those magnets within you and the television and computers are within your reach then electric signals flow.
BEWARE GAMERS, slow down when you play your computer games. SPEED OF LIGHT can kill.