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SlideshowReport

Early History of the Universe

Description
Early History of the Universe
Current theory holds that, as the universe cooled, the four forces separated from their initially unified state.
The inflationary epoch lasted from 10–36 s to 10–32 s after the Big Bang. Quarks became confined together,
thereby creating neutrons and protons 10–6 s after the Big Bang. The universe became transparent to light
(that is, photons decoupled from matter) when the universe was about 1.2 × 1013 s (380,000 years) old.
The physics of the Planck era is presently unknown
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