Big Bang of the world happened a little before the beginning of space and time. During the 1930s other ideas were proposed as non-standard cosmologies to explain Hubble's observations, including the Milne model, the oscillatory universe (originally suggested by Friedmann, but advocated by Albert Einstein and Richard Tolman) and Fritz Zwicky's tired light hypothesis. After World War II, two distinct possibilities emerged. One was Fred Hoyle's steady state model, whereby new matter would be created as the universe seemed to expand. In this model the universe is roughly the same at any point in time. The other was Lemaître's Big Bang theory,
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