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  1. › wiki › Heian_periodHeian period - Wikipedia

    The Heian period (平安時代, Heian jidai) is the last division of classical Japanese history, running from 794 to 1185. It followed the Nara period, beginning when the 50th emperor, Emperor Kanmu, moved the capital of Japan to Heian-kyō (modern Kyoto).

  2. › wiki › UniverseUniverse - Wikipedia

    The initial hot, dense state is called the Planck epoch, a brief period extending from time zero to one Planck time unit of approximately 10 −43 seconds. During the Planck epoch, all types of matter and all types of energy were concentrated into a dense state, and gravity—currently the weakest by far of the four known forces—is believed to have been as strong as the other fundamental ...

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