A scientific theory is a substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment and the science community validates each theory before it is accepted. If new evidence is discovered that the theory does not accommodate, the theory is generally modified in light of this new evidence. Any scientific theory gains much credibility if it can make testable predictions that are then discovered to be valid. Discuss this aspect in relation to the Big Bang theory.

scientists believed that there was a small atom that was super hot, and they believed that inside of that was our universe. that is how they came up with the big bang theory. these were ideas from scientists, not facts, that’s why it is called a theory. scientists continue to study to try and prove this theory.

Answer Link