Over a hundred years ago, Albert Einstein published what would become his theory of special relativity, and since then, there have been quite a few experiments that support Einstein's ideas. That's the way science usually works. A
hypothesis is proposed, and if it's deemed worthy enough, other people will actually try to test out the
hypothesis and see if its predictions can be verified (and every worthy
hypothesis needs to be able to predict something that isn't already known). As non-traditional scientific publishing becomes easier and more popular, though, the signal-to-noise for interesting ideas can get a bit difficult to discern. Luckily, there are still some folks willing to bear the burden of debunking extraordinary claims from an endless stream of nearly-good ideas.
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post