|| SPACE || COSMOLOGY || HAPPY || on Instagram: "As Professor David Tong explains, this expression is essentially the entire known physics of the universe written in a single compact form. It combines Einstein’s description of gravity with the quantum fields that account for the electromagnetic force, the strong force, and the weak force. Alongside these forces, it also includes the fields that represent all matter particles quarks, electrons, neutrinos and the Higgs field that gives those parti