We indicate the first steps towards the solution of what may be called the Great Twin Puzzles of Physics Today: the so-called quantum-measurement problems (I), and emergence of Newton’s force law from quantum mechanics (II). One of our key observations in (I) is that the fundamental degrees of freedom of our world are pointlike particles, leading to a natural explanation of the (apparent) wave-function collapse, after each measurement. Quantum fluctuations expressed in the form of the wave function are real physics of quantum mechanical law. Newton’s force law is derived for an isolated macroscopic body in the vacuum (II), after a discussion on the necessary and sufficient conditions for the CM of a body to have a classical trajectory. We illustrate this for weak gravitational forces, a harmonic-oscillator potential, and external constant electromagnetic fields slowly varying in space. The concept of the Quantum Ratio emerges from the discussions, as an approximate but universally valid criterion for discriminating a classical from a quantum system.
