To put it one way, a collection of Shakespeare's plays is richer than a phone book that uses the same number of letters; to put it another, the essence of information lies in the relationships among bits, not their sheer number.

Numbers instill a feeling for the lie of the land, and furnish grist for the mathematical mill that is the physicist's principal tool.

The solution of the Monty Hall problem hinges on the concept of information, and more specifically, on the relationship between added information and probability.

We don't know what energy is, any more than we know what information is, but as a now robust scientific concept we can describe it in precise mathematical terms, and as a commodity we can measure, market, regulate and tax it.

Entropy is not about speeds or positions of particles, the way temperature and pressure and volume are, but about our lack of information.

Information gently but relentlessly drizzles down on us in an invisible, impalpable electric rain.

The problem of defining exactly what is meant by the signal velocity, which cropped up as long ago as 1907, has not been solved.