The Quantum Mechanic.

In this article the author talks about the theory's advancing years, even college-educated adults tend to have only a hazy sense of what quantum mechanics says, and for good reason. It mentions that the physicists use it to predict the behavior of the fundamental particles, like electrons, that make up atoms and the photons that make up light, and in spite of its having been the basis of many of the 20th century's signature technologies.