Ok this may seem almost silly and childish but... Why isn't everything just clumped together? Why is there space between things? Why isn't the universe just one big planet of matter going from more to less dense if gravity makes things attract each other? Why are there planets and space? Why is there space between things? Why would anything ever break apart? Fundamentally, wouldn't we think that "mass" attracts more mass.. or I like to think outside the box, and say that gravity attracts more gravity.. so wouldn't things would just start sticking together, or at least be on that path?