John King and the Big Bang

John King is not widely known in connection with the Big Bang theory; perhaps you mean scientists like Edwin Hubble or Georges Lemaître, who contributed to understanding cosmic expansion. The Big Bang theory explains the universe's origin as a rapid expansion from an extremely hot, dense state about 13.8 billion years ago. Over time, the universe has continued to expand and cool, leading to the formation of galaxies, stars, and planets. This model is supported by evidence such as cosmic microwave background radiation and the observed redshift of distant galaxies, confirming that the universe is evolving from an initial, incredibly compact point.