Big Bang theoretical past period when the Universe was much hotter, denser and rapidly expanding
Newton's laws of motion Classical formulation of Mechanics by Isaac Newton, consisting of three simple laws. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
Quantum mechanics branch of physics dealing with phenomena at scales of the order of the Planck constant
Utilitarianism ethical theory which holds that the right action is the one that maximizes aggregate well-being