Noun
(cosmology) the theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature
Source: WordNetbig-bang theory
The Big Bang theory says nothing about what banged, why it banged, or what happened before it banged. Alan Guth
Four predictions of the Big Bang Theory have now been verified - surely enough to quench even the most biased critics. Joseph Silk
I believe in the beginning God created the Heaven and the Earth, and God did it that way on purpose just to make the Big Bang theory look stupid. Kent Hovind
The Gran Sasso results could be seen as tentatively offering support for the big bang theory – if we could find a way to test that they are indeed travelling backwards in time. Jayant Narlikar
Inflation is a prequel to the conventional Big Bang theory. ...It does provide a theory of the propulsion that drove the universe into this humungous episode of expansion which we call the Big Bang. Alan Guth
According to the big bang theory the universe is only 13 billion years old... We made some observations a year ago which we are still trying to explain but the simplest explanation seems to be that there stars that are 20 billion years old. Jayant Narlikar