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The theory that suggests for every big bang there is a crunch is known as the "Big Crunch" theory. It proposes that the expansion of the universe will eventually stop and reverse, leading to a contraction of the universe back to a singular point, followed by another big bang.
The Big Crunch hypothesis.
The concept of the Big Crunch theory was primarily developed by physicist George Gamow in the 1940s, building upon the expanding universe theory proposed by Georges Lemaître and Edwin Hubble. It suggests that the universe could eventually stop expanding and collapse back into a hot, dense state, leading to a potential "crunch" where all matter is squeezed into a tiny space.
The Big Bounce theory suggests that the universe expands and contracts in a continuous cycle, with each cycle ending in a "big crunch" followed by a new "big bang." This theory is an alternative to the Big Bang theory and proposes that the universe has no beginning or end.
Actually, no one knows if anything can last forever. No one knows the future of the universe. One theory has this universe expanding and then collapsing into a big crunch where everything will be destroyed. Another theory has the this universe bleeding into others in which case it is possible for material to last for a much longer period of time.