Argeïkum: Verskil tussen weergawes

 

== Lewe ==

Wetenskaplike bewyse dui aan dat lewe op Aarde minstens 3,5&nbsp;miljard jaar gelede begin het.<ref name='AmSci'>{{cite journal |last=de Duve |first=Christian |authorlink=Christian de Duve |title=The Beginnings of Life on Earth |url=http://www.americanscientist.org/issues/pub/the-beginnings-of-life-on-earth/1 |journal=American Scientist |date=Oktober 1995 |accessdate=15 Januarie 2014}}</ref><ref name="AT-20120904">{{cite web |last=Timmer |first=John |title=3.5 billion year old organic deposits show signs of life|url=http://arstechnica.com/science/2012/09/3-5-billion-year-old-organic-deposts-show-signs-of-life/ |date=4 September 2012 |work=Ars Technica |accessdate=15 Januarie 2014 }}</ref> Die vroegste bewyse van lewe is [[grafiet]] wat biogenies blyk te wees en voorkom in 3,7&nbsp;miljard jaar oue afsettingsgesteentes wat in Wes-[[Groenland]] ontdek is<ref name="NG-20131208">{{cite web |url =http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2025.html|authors= Yoko Ohtomo, Takeshi Kakegawa, Akizumi Ishida, Toshiro Nagase, Minik T. Rosing| title =Evidence for biogenic graphite in early Archaean Isua metasedimentary rocks |publisher =''Nature Geoscience''|doi=10.1038/ngeo2025|date=8 Desember 2013|accessdate =9 Desember 2013 }}</ref> en [[fossiel]]e in 3,48&nbsp;miljard jaar oue [[sandsteen]] wat in Wes-[[Australië]] ontdek is.<ref name="AP-20131113">{{cite news |last=Borenstein |first=Seth|title=Oldest fossil found: Meet your microbial mom|url=http://apnews.excite.com/article/20131113/DAA1VSC01.html |date=13 November 2013 |work=AP News|accessdate=15 November 2013 }}</ref><ref name="AST-20131108">{{cite journal |last1=Noffke|first1=Nora|last2=Christian |first2=Daniel |last3=Wacey |first3=David |last4=Hazen |first4=Robert M.|title=Microbially Induced Sedimentary Structures Recording an Ancient Ecosystem in the ca. 3.48 Billion-Year-Old Dresser Formation, Pilbara, Western Australia|url=http://online.liebertpub.com/doi/abs/10.1089/ast.2013.1030 |date=8 November 2013 |journal=Astrobiology |doi=10.1089/ast.2013.1030 |accessdate=15 November 2013 }}</ref>