Clay Shirky

Common sense solutions to lowering your gasoline bills can go far. Carpooling, taking fewer or shorter road trips, and ensuring that your tires are fully inflated can all help stop the pinch at the pump.

The smaller the planets are, they are, other things being equal, of so much the greater density; for so the powers of gravity on their several surfaces come nearer to equality. They are likewise, other things being equal, of the greater density, as they are nearer to the sun.