Answer: oscillating universe theory
Explanation:
- The oscillating universe theory is a modification of the famous big bang theory.
- According to this theory, there are successive cycles of expansion and contraction that occurs in the universe and due to the contraction, the universe gets confined into a very small volume which has a large density.
- When the universe gets confined in such a way then, it is said that a 'bounce' will occur and, it would thus oscillate between the big bang and the big crunch.
- Thus, this theory states that for every big bang there is a big crunch.
