I didn't know this project was going on. It sounds really cool! Gravity waves are the ripples in the fabric of space/time cause by an object interacting with it, for example, a planet floating near. Sounds like they're trying to detect the ripples left from the Big Bang, which would be incredibly weak by now, I suspect. We can still detect radiation from the Big Bang, so it stands to reason that they'd be looking for "gravity waves". The problem with detecting them is that there is so much interference with all the matter we see, as well as the far greater amount of matter we don't see (the fact that we don't know what dark matter is yet really complicates things, I think), makes it difficult to be sure that the waves they're observing actually came from the Big Bang. If they aren't detected, I personally think that it may be because we're not smart enough to figure it out yet. It seems to be an incredibly complex process. I'm looking into this more because I think it's fascinating! Thanks for sharing! I'll come post again if I find anything interesting to add.