Biology By ArmandoT Jan 1, 2015 Solar Nebula Period: Jan 1, 2015 to Dec 31, 2015 Biology Jan 29, 2015 Earth has shape Jan 31, 2015 Metal Core Feb 27, 2015 Oceans begin forming Mar 29, 2015 Hydrosphere formed Apr 5, 2015 Liquid water Apr 12, 2015 supercontinent vaalbara Apr 20, 2015 Oldest fossils Apr 20, 2015 Firsrt prokaryotes Jun 30, 2015 Formation of supercontinent Ur Jul 15, 2015 Supercontinent Kenorland formed Jul 20, 2015 Oldest fossils Jul 24, 2015 Enough oxygen for photosynthesis Aug 28, 2015 Supercontinent Nena and Colombia Sep 20, 2015 First eukaryotes appear Nov 17, 2015 Soft-bodied organisms appear Nov 19, 2015 Explosion of life, hard-bodied organisms appear Nov 28, 2015 Ozone layer forms Nov 30, 2015 Land plants appear Dec 2, 2015 First fish Dec 5, 2015 First amphibians Dec 9, 2015 1st reptiles Dec 15, 2015 First mammals Dec 16, 2015 Dinosaurs appear Dec 21, 2015 Flowering plants reproduce Dec 25, 2015 Dinosaur extinction
