Big Bang

evolution of the universe

Our liberty depends on the freedom of the press, and that cannot be limited without being lost. Thomas Jefferson, Letter to Dr. James Currie (28 January 1786) Lipscomb & Bergh 18:ii

In the Beginning there was nothing, which exploded. Terry Pratchett, Lords and Ladies

Big Bang (Wikipedia) The Big Bang event is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models of the Big Bang explain the evolution of the observable universe from the earliest known periods through its subsequent large-scale form. These models offer a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, and large-scale structure. The overall uniformity of the Universe, known as the flatness problem, is explained through cosmic inflation: a sudden and very rapid expansion of space during the earliest moments. However, physics currently lacks a widely accepted theory of quantum gravity that can successfully model the earliest conditions of the Big Bang.