Earth's History Calendar by: Anna Jagneaux & Alex Fischler By annajagneaux Jan 1, 2012 Earth Forms! Period: Jan 1, 2012 to Jan 1, 2013 1 Calendar year Feb 6, 2012 First Atmosphere Feb 25, 2012 First Cells! Mar 4, 2012 Oldest Rocks! Jul 18, 2012 First Oxygen Oct 5, 2012 Rodinia Forms Oct 28, 2012 First Oceans Nov 2, 2012 Rodinia Splits Apart Nov 5, 2012 Snowball Earth Nov 18, 2012 First fish Nov 22, 2012 First Vertebrates Nov 25, 2012 First Plants Dec 1, 2012 First Insects! Dec 2, 2012 First Amphibians Dec 5, 2012 First Reptiles! Dec 7, 2012 Pangea Forms Dec 14, 2012 First mammals! Dec 15, 2012 Pangea breaks apart Dec 26, 2012 Dinosaur Extinction
