A common way to compute density is, of course, to take the ratio of an object's mass to its volume. But other types of densities exist, such as the resistance of somebody's brain to the imparting of common sense.
Neil deGrasse TysonThe most creative people are motivated by the grandest of problems that are presented before them.
Neil deGrasse TysonThe first colony on Mars is not going to be built by a private company. How are you going to make money? You're not.
Neil deGrasse TysonCivilization just takes it as a given that the whole world was flooding. Then science came and you had geology and modern astrophysics, and time became well understood going back billions of years. So enlightened religious people, as a necessity, had to shed the magical elements of the Bible. A little known fact is that Thomas Jefferson did just that. There's something called the Jefferson Bible. It's not widely publicized because it sort of conflicts with certain people's ideas of what the founding fathers were.
Neil deGrasse Tyson