If earth's history were condensed into one year. By Frank Godlesky Jan 1, 2013 Earth begins to cool. 'http://www.complex-life.org/node/262' Mar 12, 2013 Oldest chemical evidence of life http://ncse.com/evolution/science/earliest-evidence-life Apr 1, 2013 First Prokaryotic Cells Idendified http://www.biology.arizona.edu/cell_bio/tutorials/pev/page2.html Aug 17, 2013 First Eukaryotic Cells Identified http://www.scientificamerican.com/article.cfm?id=when-did-eukaryotic-cells Oct 1, 2013 First Multicellular Organisms http://planet.uwc.ac.za/nisl/biodiversity/loe/page_12.htm Nov 12, 2013 First Animals with Limbs http://evolution.berkeley.edu/evolibrary/article/evograms_04 Nov 30, 2013 First Land Plants http://steurh.home.xs4all.nl/eng/old1.html Dec 1, 2013 FIrst Land Animals http://articles.timesofindia.indiatimes.com/2013-01-14/flora-fauna/36331203_1_tetrapods-fossils-x-rays Dec 26, 2013 Extinction of Dinosaurs http://www.enchantedlearning.com/subjects/dinosaurs/extinction/ Dec 31, 2013 First Humans at 11:00 PM http://www.amnh.org/exhibitions/past-exhibitions/human-origins/the-history-of-human-evolution/the-first-humans
