Interesting fact: According to the Theory of Relativity, photon particles have not aged a second since the Big Bang.
Source: The Elegant Universe, by Brian Greene
That blows my mind. I can (after a bit of contemplation) understand how they can travel through space--time has stopped from the perspective of the photon, but from any other perspective, it continues on regardless. But...well...what happens from the perspective of the photon?
No, scratch that I don't understand how the damned thing can travel through space. How can it travel through space without it's perspective travelling through the intervening time?
Also, when scientists manage to slow a photon down, does it begin to age?