Time has been called God's way of making sure that everything doesn't happen at once. In the same spirit, noise is Nature's way of making sure that we don't find out everything that happens. Noise, in short, is the protector of information.

Science has taught us that what we see and touch is not what is really there.

If quantum communication and quantum computation are to flourish, a new information theory will have to be developed.

In fact, an information theory that leaves out the issue of noise turns out to have no content.

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.

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

An electron is real; a probability is not.