3 Proterozoic Eon 2.5 bya – 543 mya stable continents first appearMost life are Bacteria and Archaeansfirst evidence of oxygen build-up in the atmosphereThis global catastrophe spelled doom for many bacterial groups&made possible the explosion of eukaryotic forms.
4 Endosymbiosis The rise of Eukarya 1.8 bya What does it mean?Endo = within sym = togetherbiosis = life Endosymbiosis = organisms of a different species living together, with one of the organisms living within the otherSymbiosis between different species of eubacteria&between archeabacteria and eubacteriaThe rise of Eukarya 1.8 bya44
12 850 MYA First FungiAmber fossilsthe fossil on right are fungal filaments resemble living filaments of common Candida species. the fossil at right has preserved the perithecium with spores used for reproduction.
13 760 MYA-First AnimalOtavia antiqua -a sea spongue
17 Cambrian Explosion: ~570mya- 500mya Finally the ocean is full of animals with hard parts… by the early Paleozoic there are lots of animals that can form fossils.Cambrian Explosion: ~570mya- 500mya1717
18 Cambrian Explosion: A sudden explosion of complex, multicellular life at the beginning of the PaleozoicMany of these early animals looked very strange, unlike any animals we find on Earth today.18
55 Post Ice Age: Large Mammals Ground Sloth: 20 mya
56 first to travel long distances & use fire 2.5 MYA- Homo habilis 175,000 yr ago- Homo sapiens1.8 MYA- Home erectusfirst to travel long distances & use fire2.5 MYA- Homo habilisFirst tool user3.9 MYA- AustralopithecusafarensisFirst bipedalism