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The Keys to the Universe
Rethinking school and mentoring in all its forms.

The chronology of the universe describes the history and future of the universe according to Big Bang cosmology. The metric expansion of space is estimated to have begun 13.8 billion years ago (…). For the purposes of this summary, it is convenient to divide the chronology of the universe into four parts…

Source (2017): "Chronology of the universe" at https://en.wikipedia.org/wiki/…
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