Sejarah Bumi: Perbedaan antara revisi

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Bot: Mengganti Astronaut-EVA.jpg dengan Bruce_McCandless_II_during_EVA_in_1984.jpg
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<ref name="Hoffman">{{cite journal|last1 = Hoffman|first1 = P.F.|last2 = Kaufman|first2 = A.J.|last3 = Halverson|first3 = G.P.|last4 = Schrag|first4 = D.P.|year = 1998|title = A Neoproterozoic Snowball Earth|url =|journal = [[Science (journal)|Science]]|volume = 281|issue = 5381|pages = 1342–1346|doi=10.1126/science.281.5381.1342|bibcode = 1998Sci...281.1342H|pmid=9721097}}</ref>
<ref name="Xiao">{{cite journal|last1 = Xiao|first1 = S.|last2 = Laflamme|first2 = M.|year = 2009|title = On the eve of animal radiation: phylogeny, ecology and evolution of the Ediacara biota|url =|journal = Trends in Ecology and Evolution|volume = 24|issue = 1|pages = 31–40|doi = 10.1016/j.tree.2008.07.015|pmid = 18952316 }}</ref>
<ref name="bbc-new blood">{{cite episode|author = Wright, Jo|title = New Blood|episodelink = Walking with Dinosaurs#"New Blood"|number=1|series = Walking with Dinosaurs|serieslink = Walking with Dinosaurs|airdate = 1999|writers = BBC|url = http://www.bbc.co.uk/sn/prehistoric_life/dinosaurs/chronology/220mya1.shtml}}</ref>
<ref name=Runkel>{{Cite journal|last=Runkel|first=Anthony C.|coauthors=Mackey, Tyler J., Cowan, Clinton A., Fox, David L.|title=Tropical shoreline ice in the late Cambrian: Implications for Earth's climate between the Cambrian Explosion and the Great Ordovician Biodiversification Event|journal=GSA Today|date=1 November 2010|pages=4–10|doi=10.1130/GSATG84A.1|ref=harv}}</ref>
<ref name=Palmer>{{Cite journal|last=Palmer|first=Allison R.|title=The biomere problem: Evolution of an idea|journal=Journal of Paleontology|year=1984|volume=58|issue=3|pages=599–611|ref=harv}}</ref>