Astronomy Stack Exchange is a question and answer site for astronomers and astrophysicists. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

This question already has an answer here:

If the big bang expanded the universe from a singularity point, that means that there was matter before, so where and how did matter form for the first time if it's even possible to know such a thing?

share|improve this question

marked as duplicate by called2voyage Feb 18 '14 at 21:11

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

@called2voyage I've searched before I asked, could you point me to the question you think is similar to mine? – A.K Feb 19 '14 at 13:48

"before" is not the right word. It suggests that there was an arrow of time which allowed to trace events. But time was created only with the big bang, there was no before.

We don't know where the matter came from, or what caused the Big Bang. One hypothesis suggests that it was caused by the collision of branes in other universes, but there's no way to verify this, so in a strict sense it isn't science. Many researchers think we'll never have an answer this.

share|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.