photons are not affected by time or entropy, but are governed by some unknown energy deeper in the implicate here are my reasonings: According to the thermodynamic arrow of time, disorder for every thing is always increasing. entropy is directly related to time and they cannot go backwards.But as you aproach the speed of light time starts to slow down. Therefore entropy decreases. This explains why decay in matter happens slower when approaching the speed of light. Now once you reach the speed of light, the border of past and future, time would stand still. This would mean that something with speed C ( obviously a massless particle) could travel through space (according to observation), but some how be suspended in time with zero entropy. Is this possible? its just a thought. please respond to point out mistakes in reasoning.