Kaneda, I said nothing about working at a particle accelerator. I was making a joke, so as to lightheartedly remedy your prejudices about my level of intelligence. Hence my focus on something directly related to acceleration (an accelerator). You were the one who accused me of not knowing what acceleration is, so don't get all in a huff over something you caused in the first place. The only time you're going to see my ego unleashed is when I need to give someone a verbal spanking. With you, your ego is out 24 hours a day. This is why they teach people to share in Kindergarten, so as to stop your particular brand of behaviour from surviving beyond childhood. Take this and extend it to any object: http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/muon.html You seriously need to rethink your analogies. Just because the element on my stove is colder now than it was last night does not imply that its velocity relative to the rest of my house had ever changed. How you managed to gather that this is what I was implying is beyond me. Hanlon's razor comes into play here, and I'm seriously doubting that you're an evil person. In regard to absolute rest, I'm showing you that your analogy is completely flawed since that's what would occur. If what you suggested were even remotely possible, then the electron would not have a well-defined amount of mass-energy. In other words, you would end up with an infinite collection of electron "types". In reality, you must certainly already know that there is one and only one electron rest mass known to man. If the inertia of a massive object were to decrease with increased relative velocity, then reiku's own point that v = c is unachievable would be incorrect. Of course, we know that's not true, since it's been proven correct using accelerators countless times using a level of precision that would make a surgeon blush. You brought up accelerators as your own argument, but it appears that you may have missed exactly what they are doing there -- accelerating particles to very high velocity by utilizing Einstein's mechanics, and not Newton's. You two get your ducks in a row before you start tag teaming with the smack talk. You're worse than the mafia "gurus" on physorg.com. At least they recognize when they've been dressed down.