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The Big Bang theory was proposed (happened) in the middle of the 20th Century.

The theory, and the work exploring it, suggest that the Big Bang happened about 13.7 billion years ago.

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Q: When do scientists think the Big Bang theory happened?
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Related questions

What do scientists think have happened to most ancient species?

The big bang


What do you think scientists would do if they found evidence that did not support the Big Bang theory?

Discard it all.


Scientists extrapolate backwards in time to derive?

the big bang theory


Why is the big bang theory a mystery?

The Big Bang theory isn't a mystery: the scientists working on it know exactly what they mean by what they say.


What was before the big bang theory?

Before the Big Bang theory, many scientists believed that the universe was static, or infinitely unchanging.


Do scientists agree on the Big Bang theory now?

Answer: Certainly not.


What do scientists call the most popular theory of the origin of the universe?

The Big Bang Theory


What is the name of the scientific theory that tells scientists how they believe the universe was formed?

The Big Bang Theory


What does scientists hypothesize regarding the sun and the planet?

The big bang theory


What do scientists call the event that started the universe?

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How many people believe in the big bang theory?

It depends, because some might say 'scientists'. But not all scientists believe in this theory. Also, there are those who believe in a similar idea to the Big Bang, but it is not refered to as 'The Big Band Theory.'


How did people discover the big bang theory?

It is a theory, therefore it was not discovered. It was thought up by scientists and philosophers.