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The universe refers to the cosmos; all of space-time and that which exists as part of it. Alternatively, it can refer to the observable universe, which only contains the part we can see. Questions tagged with this should ask about physics at scales the size of the universe or specific properties of the universe

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Does new energy creation exist?

For example, one theory called Quantum Fluctuation states that 'normal' and anti energy is constantly being created and then colliding throughout the universe. …
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