Big Bang is a past horizon, though in practice our view is also limited by the opacity of the universe at early times. So our view cannot extend further backward in time, though the horizon recedes in space. If the expansion of the universe continues to accelerate, there is a future horizon as well. English astronomer Fred Hoyle is credited with coining the term "Big Bang" during a 1949 BBC radio broadcast, saying: "These theories were based on the hypothesis that all the matter in the universe was created in one big bang at a particular time in the remote past." It
The Big Bang Theory (season 1) scripts and provides dialogue, math equations and diagrams used as props. Clips from the season finale, "The Tangerine Factor", gained popularity on the Chinese video-sharing website Tudou because of Sheldon's inaccurate Mandarin. <onlyinclude> </onlyinclude> "The Big Bang Theory" initially received mixed reviews, receiving 52% "rotten" score on review aggregator Rotten Tomatoes, based on 23 reviews, with the critics consensus reading ""The Big Bang Theory" brings a new class of character to mainstream television, but much of the comedy feels formulaic and stiff." It also received a 57-point score on review aggregator Metacritic, indicating "mixed or average reviews", based on 23