The Big Bang. A Timeline. What do you think you know about the Big Bang?. Take a couple of minutes to write down what you know, or think you know about the big bang. The Universe and Time. The Big Bang is a theory that tells a story: the story of our universe.
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The Big Bang
The meeting of anything made of particles and antiparticles ends in annihilation of both entities.
“If you ever meet your antiself, don’t shake hands.”
Our Milky Way was born some 8.3 billion years ago.