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  2. 4th millennium BC - Wikipedia

    en.wikipedia.org/wiki/4th_millennium_BC

    The 4th millennium BC spanned the years 4000 BC to ... a number of indicators shows there was a global change in climate 5,200 years ago, ... 4000 BC – Epoch of the ...

  3. Timeline of prehistory - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_prehistory

    This timeline of prehistory covers the time from the appearance of Homo sapiens approximately 315,000 years ago in Africa to the ... 4000 BC: Trypillian build ...

  4. List of decades, centuries, and millennia - Wikipedia

    en.wikipedia.org/wiki/List_of_decades,_centuries...

    See calendar and list of calendars for other groupings of years. See history , history by period , and periodization for different organizations of historical events. For earlier time periods, see Timeline of the Big Bang , Geologic time scale , Timeline of evolution , and Logarithmic timeline .

  5. A Bronze Age-style ship just sailed through the Persian Gulf ...

    www.aol.com/bronze-age-style-ship-just-152522321...

    Using a supply list from an ancient clay tablet, experts have reconstructed a large Bronze Age ship from 4,000 years ago and sailed it around the Persian Gulf.

  6. A 4,000-year-old timber circle on ... “We know that the period in which they were constructed 4,000 years ago was a prolonged period of decreased atmospheric temperatures and severe winters and ...

  7. Timeline of ancient history - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_ancient_history

    The date used as the end of the ancient era is arbitrary. The transition period from Classical Antiquity to the Early Middle Ages is known as Late Antiquity.Late Antiquity is a periodization used by historians to describe the transitional centuries from Classical Antiquity to the Middle Ages, in both mainland Europe and the Mediterranean world: generally from the end of the Roman Empire's ...

  8. 40 Curious History Facts And Stories That May Surprise Even ...

    www.aol.com/history-uncovered-50-powerful-photos...

    #17 A Whopping 4,000 Years Ago, Ancient Egyptians Were Performing Sophisticated Dental Work That Remains Astounding Even Today. Meanwhile, the Egyptians are also believed to have invented ...

  9. Holocene climatic optimum - Wikipedia

    en.wikipedia.org/wiki/Holocene_climatic_optimum

    Different sites often show climate changes at somewhat different times and lasting for different durations. At some locations, climate changes may have begun as early as 11,000 years ago or have persisted until 4,000 years ago. As noted above, the warmest interval in the far south significantly preceded warming in the north. [citation needed]