Space-time Definition and 406 Threads

What is space-time "made out of"? A thread in another forum about the definition of "nothing" got me thinking. I know matter is composed of molecules, which are composed of atoms, which are composed of electrons, neutrons and protons, which are composed of quarks, etc ... But what about...

Is the value of Pi related to the curvature of space-time? Is it the value that it is because space-time is more or less flat? If the universe were of a greater open or closed curve, would Pi be a different value? Thanks, Glenn

i have looked on the net but i can not find a site that explains the MECHANICS of gravity wave production, as i understand it is an oscillation in space time, if gravity is warped space time how can the destruction of a massive body make it oscilate, it implies some sort of bounce, but how...

While reading an article on time travel I came across a section titled 'Is Time an Illusion?'. Immediately I was drawn to a conversation I shared with a good friend of mine a few months prior. We had been talking all night about different subjects that are unexplained but interested us to look...

Ok I'm new here and I'm trying to get on my feet so I hope that this is the right forum to post this in. Anyway, Einstein supposedly proved that there was no force of gravity, that it could be subsituted with accelaration, and that gravity is made by bent space time. I have quite a few...

I came across this article: http://www.spacedaily.com/news/cosmology-03i.html Thoughts?