Editing 3rd millennium BC (section)

==Inventions, discoveries, introductions==
[[File:The Great Pyramid of Giza.jpg|200px|thumb|[[Great Pyramid of Giza]], Kheops.]]
[[File:MedicineWheel.jpg|200px|thumb|The Medicine Wheel in [[Bighorn National Forest]], Wyoming, United States.]]
*The oldest documented evidence of the practice of [[meditation]] are wall arts in the [[Mohenjodaro]] and [[Harappa]].
*[[Stepwell]]: Earliest clear evidence of the origins of the stepwell is found in the [[Indus Valley civilisation]]'s archaeological site at [[Mohenjodaro]] in [[Pakistan]].
*Toilet platforms above [[Drain (plumbing)|drains]], in the proximity of wells, are found in several houses of the cities of [[Mohenjodaro]] and [[Harappa]].
* Pottery develops in [[Americas]] ([[30th century BC]]).
* c. [[3000 BC]]: [[Potter's wheel]] appears in [[Mesopotamia]].
* [[2900 BC]]–[[2400 BC]]: [[Sumer]]ians invent phonogram (linguistics).
* [[2650 BC]]: Reservoirs, script, metals and pottery used in the city of [[Dholavira]] in [[Indus Valley civilization]].
* {{Circa|[[2300 BC]]}}: Metals are used in [[Northern Europe]].
* [[China|Chinese]] record a [[comet]].
* Building of the Great [[Pyramid]] of [[Giza]] ([[26th century BC]]).
* Sails used on [[ship]]s ([[20th century BC]]).
* First [[ziggurat]]s built in [[Sumer]].
* [[Near East]] civilizations enter [[Bronze Age]] around 3000 BC.
* Oldest known [[medicine wheel]] constructed in the [[Americas]].
* First [[Copper]] (~2500 BC) and then [[Bronze]] (~2000 BC) and other types of [[metallurgy]] are introduced to [[Ireland]].
* The [[kunga (equid)|kunga]] was first bred in Ancient Syria and Mesopotamia by hybridizing captured now-extinct [[Syrian wild ass]] males with [[domestic donkey]] females between 2600 and 2000 BCE. It later fell out of favor when both [[domestic horse]]s and their donkey hybrids, [[mule]]s, arrived in the ancient Near East at the end of the millennium.
* [[Domestication of the horse]] with the coming of [[Proto-Indo-Europeans|Indo-Europeans]] in central Eurasia.
* The [[chariot]] emerges in Eurasian Steppe just before 2000 BC.
* The [[camel]] ([[dromedary]]) domesticated (though widespread use took until mid-to-late [[2nd millennium BC]]).<ref>{{cite book|first=Chris|last=Scarre|title=Smithsonian Timelines of the Ancient World|year=1993|isbn=978-1-56458-305-5|url=https://books.google.com/books?id=Yy3VngEACAAJ|page=176|publisher=Smithsonian Institution |quote=Both the dromedary (the one-humped camel of Arabia) and the Bactrian camel (the two-humped camel of Central Asia) had been domesticated since before 2000 BC.}}</ref><ref>{{cite book|last=Bulliet|first=Richard W.|title=The Camel and the Wheel|series=Morningside Book Series|location=New York|publisher=Columbia University Press|year=1990|orig-year=1975|page=183|isbn=978-0-231-07235-9|url=https://books.google.com/books?id=Vnf74PlZ7Z8C|quote=As has already been mentioned, this type of utilization [camels pulling wagons] goes back to the earliest known period of two-humped camel domestication in the third millennium BC.}}</ref>
* Indoor plumbing and sewage in the [[Indus Valley civilization]].<ref>{{Cite web|last=Khan|first=Saifullah|title=Chapter 2 Sanitation and wastewater technologies in Harappa/Indus valley civilization (ca. 2600-1900 BC|url=https://www.academia.edu/5937322|language=en}}</ref>[[File:Ur chariot.jpg|thumb|200px|Chariot depicted on the [[Standard of Ur]], from the [[Sumer]]ian city-state of [[Ur]], {{Circa|2600 BC}}]]
*[[Sumer]]ian medicine discovers the healing qualities of mineral springs.<ref>{{Cite book|last=Johnston|first=Douglas M.|url=https://books.google.com/books?id=99H_tpN_iVkC&dq=sumerian+mineral+springs&pg=PA147|title=The Historical Foundations of World Order: The Tower and the Arena|date=2008|publisher=Martinus Nijhoff Publishers|isbn=978-90-04-16167-2|language=en}}</ref>
* Weaving loom known in Europe.<ref>{{Cite web|title=Loom {{!}} weaving|url=https://www.britannica.com/technology/loom|access-date=2021-01-20|website=Encyclopedia Britannica|language=en}}</ref>
* Ornamental [[button]]s—made from seashell—were used in the [[Indus Valley civilisation]] for ornamental purposes by 2000 BCE.
* Sumerian numerical system based on multiples of 6 and 12.{{citation needed|date=October 2018}}
* Egyptians begin use of papyrus.<ref>{{Cite web|url=https://www.metmuseum.org/toah/hd/pyma/hd_pyma.htm|title=Papyrus-Making in Egypt|last=Capua|website=www.metmuseum.org|access-date=2019-10-05}}</ref>
* [[Austronesian peoples|Austronesian]] peoples have developed lateen sail, and the out-rigger as well as extensive development of celestial navigation systems.{{citation needed|date=October 2018}}
* Oldest known evidence of the [[Cannabis smoking|inhalation of cannabis smoke]], as indicated by [[charred]] cannabis [[seed]]s found in a [[ritual]] [[brazier]] at a [[burial site]] in present-day [[Romania]].<ref>{{cite book|last=Rudgley|first=Richard|author-link=Richard Rudgley|year=2000|orig-year=1999|title=Lost Civilisations of the Stone Age|location=New York|publisher=Touchstone (Simon and Schuster)|page=138|isbn=978-0-684-85580-6|url=https://books.google.com/books?id=vhSHn-B89A0C}}</ref>