In the far, far future, essentially all matter will have returned to energy. But because of the enormous expansion of space, this energy will be spread so thinly that it will hardly ever convert back to even the lightest particles of matter. Instead, a faint mist of light will fall for eternity through an ever colder and quieter cosmos. Webs are made mostly of spaces. They break easily. They barely exist. They belong to the category of half-things: mist, smoke, shrouds, ghosts, membranes, retinas or rags; and they quickly fill up with un-things: old legs and wings and heads and hollow abdomens and body bags of wasps. mist