Originally Posted By: Marchimedes
If particles have any mass, and they are travelling at the speed of light, then wouldn't that negate the theory that as mass approaches the speed of light it approaches infinate mass? Just like that, right?

Yes it would. But there's no longer any "If" about it. Decades of particle collider experiments consistently and precisely confirm the predictions of special relativity theory. So will the electricity bills LHC receives for accelerating protons to 99.9999991% of the speed of light.
"Time is what prevents everything from happening at once" - John Wheeler