> I think it's safe to say though that neither Tumblr nor WordPress, even combined, would ever have more posts than atoms on Earth =) If my math is correct, yo

> I think it's safe to say though that neither Tumblr nor WordPress, even combined, would ever have more posts than atoms on Earth =) If my math is correct, you're a wee bit off. 9,223,372,036,854,775,807 is 2^63, which is roughly 10^19. The Avogadro constant, which is about 6 * 10^23, is the number of particles (atoms / molecules) in a mole of substance, which for atoms amounts to (atom number of element) grams of mass (so e.g. 12g of C12 is a mole).