Editing 8th millennium BC (section)

==Agriculture in the Americas==
It was from c. 8000 BC that agriculture developed throughout the Americas, especially in modern Mexico. There were numerous [[New World crops]], as they are now termed, and domestication began with the [[potato]] and the [[cucurbita]] (squash) about this time.<ref>{{cite journal |title=A single domestication for potato based on multilocus amplified fragment length polymorphism genotyping |last=Spooner |first=D. M. |journal=Proceedings of the National Academy of Sciences |volume=102 |issue=41 |doi=10.1073/pnas.0507400102 |pmc=1253605 |pages=94–99 |pmid=16203994 |year=2005 |display-authors=etal |bibcode=2005PNAS..10214694S|doi-access=free }}</ref><ref>{{cite journal |last=Smith |first=Bruce D. |title=Documenting plant domestication: The consilience of biological and archaeological approaches |journal=Proceedings of the National Academy of Sciences of the United States of America |date=February 2001 |volume=98 |issue=4 |pages=1324–1326 |doi=10.1073/pnas.98.4.1324 |pmid=11171946 |pmc=33375 |bibcode=2001PNAS...98.1324S|doi-access=free }}</ref> Other crops began to be harvested over the next 7,500 years including [[chili pepper]]s, [[maize]], [[peanut]], [[avocado]], [[bean]]s, [[cotton]], [[sunflower]], [[cocoa bean|cocoa]] and [[tomato]].<ref>{{cite book |author=Smith, A. F. |year=1994 |title=The Tomato in America: Early History, Culture, and Cookery |publisher=University of South Carolina Press |page=13 |isbn=978-15-70030-00-0}}</ref><ref>{{cite journal |last1=Piperno |first1=Dolores R. |last2=Ranere |first2=Anthony J. |last3=Holst |first3=Irene |last4=Iriarte |first4=Jose |last5=Dickau |first5=Ruth |title=Starch grain and phytolith evidence for early ninth millennium BP maize from the Central Balsas River Valley, Mexico |journal=PNAS |volume=106 |issue=13 |year=2009 |doi=10.1073/pnas.0812525106 |pages=5019–5024 |pmid=19307570 |pmc=2664021 |bibcode=2009PNAS..106.5019P|doi-access=free }}</ref>