The "Big Bang Theory" occurred how long ago?
Correct answer: 13.8 billion years ago
Princess shazia
It is based on measurements of the universe's expansion and temperature fluctuations.
Sassy
The answer is in the theme song from the Big Bang theory.
peppers
Lou Lou, yeah "Theory" through me off. Thought it was a trick question.
Lou Lou
Isn’t isn’t the Big Bang occurred then, not the Big Bang “Theory”?