I'm not sure about this "thanks in advance" thing. It's almost like you can buzz around on Monday saying "oooh thanks !!" and "Yes I had eggs for breakfast" and then expect to live off the group huggies until Friday. What a load of utter rubbish.
naz_nomad has beaten me to it. But it's worth pointing out that at this stage, gravitons in particular are very hypothetical in nature, although everything on this scale is a bit murky.
your right it is a load of rubbish but if im not on the site and people have left good correct answers they will think im awfully rude not thanking them after they have spent time replying