... believed that at some point in the randomness a small bubble was formed with an temperature in excess of 10 to the power of 34 degrees. Due to the immense temperature the bubble inevitably expanded. For an extremely short period of time (billionths of billionths of a second) the bubble inflated, at the end of the inflation the universe had a diameter of a few centimetres. The temperature had cooled enough for particles of matter and antimatter to form, and they instantly destroy each other, this destruction caused the huge explosion called the big bang. The Big Bang was the start of time and space. Minutes after the "Big Bang" occurred the universe merely consisted of elementary particles such as protons, neutrons and electrons, which have been forced away from the center of the original explosion; there was also a lot of radiation at the time. The matter and radiation ...

See this essay or coursework document in full right now