|mb =5th millennium BC
|m =4th millennium BC
|ma =3rd millennium BC
}}
Events
- Sumer ian city of Ur in Mesopotamia ( 40th Century BC ); Sumer ian hegemony in Mesopotamia , with the development of Writing around the same time as the Indus Valley Civilization, base-60 Mathematics , Astronomy and Astrology , Civil Law , complex Hydrology , the Sailboat , the Wheel , and the Potter's Wheel , 4000– 2000 BC .
- Naqada culture on the Nile , 4000– 3000 BC .
- Epoch of the modern Hebrew Calendar occurred on 7 October 3761 BC .
- Jewish chronology dates Creation to September 25 or March 29 3760 BC .
- First to Fourth dynasty of Kish in Mesopotamia .
- " and Maykop Culture , likely candidates for the Proto-Indo-Europeans , the latter also a candidate for the origin of the Bronze Age .
- Ötzi The Iceman dies near the present-day border between Austria and Italy c. 3300 BC , only to be discovered in 1991 buried in a Glacier of the Ötztal Alps . His Cause Of Death is believed to be Homicide .
- New Stone Age people in Ireland build the 250,000 ton Newgrange solar Observatory c. 3200 BC .
- The Maya Calendar dates the Creation of the Earth to August 11 or August 13 , 3114 BC (establishing that date as day zero of the Long Count 13.0.0.0.0).
- According to 3102 BC , the traditional death of Krishna .
- .
- Neolithic settlement built at Skara Brae in the Orkney Islands , Scotland .
- 3000 BC – Menes unifies Upper and Lower Egypt , and a new capital is erected at Memphis .
- Discovery of Silver .
Cultures
Environmental changes
Based on studies by Glaciologist Lonnie Thompson (professor at Ohio State University and researcher with the Byrd Polar Research Center ) {Link without Title} a number of indicators shows there were a global change in climate 5,200 years ago:
- The climate was altered suddenly with severe impacts.
- Plants buried in the Quelccaya ice cap in the Peruvian Andes demonstrate the climate had shifted suddenly and severely to capture the plants and preserve them until now.
- A man trapped in an Alpine glacier (" Oetzi ") is frozen until his discovery in 1991 .
- Tree rings from Ireland and England show this was their driest period.
- Ice core records showing the ratio of two oxygen isotopes retrieved from the ice fields atop Africa’s Mount Kilimanjaro , a proxy for atmospheric temperature at the time snow fell.
- Major changes in plant pollen uncovered from lakebed cores in South America.
- Record lowest levels of Methane retrieved from ice cores from Greenland and Antarctica .
- Beginning of desertification of Sahara ( 35th Century BC ). The shift by the Sahara Desert from a habitable region to a barren desert.
Significant persons
Inventions, discoveries, introductions
Centuries
External references
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