Image of cosmic background radiation. Photo courtesy of NASA. Public

There are several pieces of evidence for the Big Bang. One is the cosmic background radiation. Cosmic radiation was discovered in the 1960s by two scientists working on telephone communications. The cosmic radiation is more or less the same throughout the universe, which meant that it didn't come from any one star or galaxy. Astronomers believe that the radiation was spread as a result of the Big Bang.
Last modified: Friday, 2 September 2011, 8:38 AM