More Energy in Grass than the Sun

Of all the sustainable things in the universe, from a planet to a star, from a daisy to an automobile, from a brain to an eye, the thing that is able to conduct the highest density of power-the most energy flowing through a gram of matter each second-lies at the core of your laptop. How can this be? The power density of a star is huge compared to the mild power drifting through a nebulous gas cloud in space. But remarkably, the power density of a sun pales in comparison to the intense flow of energy and activity present in grass. As intense as the surface of the sun is, its mass is enormous and its lifetime is 10 billion years, so as a whole system, the amount of energy flowing through it per gram per second is less than that in a sun- flower soaking up that sun's energy.

-Kevin Kelly