Question

Big bang theorist believe

Answer 1

the universe is a never ending cycle of expansion and contraction

Step-by-step explanation:

Answer 2

Before the big bang, scientists believe the entire vastness of the observable universe, including all of its matter and radiation, was compressed into a hot, dense mass just a few millimeters across. This nearly incomprehensible state is theorized to have existed for just a fraction of the first second of time.