How has the size of the universe changed over time?
Started with a BIG BANG
Our Universe started with a Big Bang at about 14.2 Billion years ago, since than it's been continuously expanding. Previously it was assumed that the universe will stop expanding at a point and shrink again but the discovery of dark energy led to new theories.Dark energy is the energy that is accelerating the universe, so we at this point are not sure about the fate of the universe. At the beginning