1931
Belgian Georges Lemaitre suggests that all material in the Universe started as a single condensed sphere that exploded.
1948
Russian-born physicist George Gamow explains the first elements formed in the explosion.
1995
Englishman Fred Hoyle shows how heavier elements are produced by massive stars.
1965
American physicist Arno Penzias and Robert Wilson discover cosmic microwave background radiation, the leftover radiation initially produced by the Big Bang.
1980
Americxan Alan Guth modifies the Big Bang theory by introducing the idea of infltion - a short period of extra expansion within a split second of the start of the Universe.
Belgian Georges Lemaitre suggests that all material in the Universe started as a single condensed sphere that exploded.
1948
Russian-born physicist George Gamow explains the first elements formed in the explosion.
1995
Englishman Fred Hoyle shows how heavier elements are produced by massive stars.
1965
American physicist Arno Penzias and Robert Wilson discover cosmic microwave background radiation, the leftover radiation initially produced by the Big Bang.
1980
Americxan Alan Guth modifies the Big Bang theory by introducing the idea of infltion - a short period of extra expansion within a split second of the start of the Universe.
