"The mystery about the quantum-classical transition stems from a crucial quality of quantum particles?... As such, they can be described by a wave function, which Schrödinger devised in 1926. A sort of quantum Social Security number, the wave function incorporates everything there is to know about a particle, summing up its range of all possible positions and movements."
Gosh! I've studied Quantum Mechanics (under Yang and Mills no less) and do you know what? I've never heard that Schrodinger wave functions were a "quantum Social Security" number! In fact, I didn't know that SS numbers "incorporate everything there is to know about a person". Sounds like the arrival of that feared Citizen ID number that follows everyone from birth to death. No wonder Sam Wormley finds SciAm to be the "ultimate" reference for all things scientific (after Wikipedia, natch).