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The Big Bang theory is the prevailing cosmological model for the earliest known periods of the universe.[1][2][3] It states that the Universe was in a very high density state and then expanded.[4][5] If the known laws of physics are extrapolated beyond where they are valid there is a singularity. Big Bang isn't considered as an explosion in space, but rather it was an explosion of space.[4] Modern measurements place this moment at approximately 13.8 billion years ago, which is thus considered the age of the universe.

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10y ago

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