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4.6 to 3.8 Billion years ago |
HADEAN |
3.8 to 2.5 Billion years ago |
ARCHEAN |
2.5 Billion to 570 Million years ago |
PROTEROZOIC |
570 Million years to the Present |
PHANEROZOIC |
570 Million years to 245 Million years |
PALEOZOIC |
245 Million to 65 Million years |
MESOZOIC ERA |
65 Million years to the Present |
CENOZOIC ERA |
570 Million years to 505 Millions years |
Cambrian Period |
505 Million years to 438 Million years |
Ordovician Period |
438 Million to 408 Million years |
Silurian Period |
408 to 360 Million years |
Devonian Period |
360 to 320 Million years |
Mississippian Period |
245 to 208 Million years |
Triassic Period |
208 to 145 Million years |
Jurassic Period |
145 to 65 Million years |
Cretaceous Period |
65 Million to 1.6 Million years ago |
Many mammals developed including primitive whales, rodents, pigs, cats, and rhinos. |
2 Million to 4 Million years ago |
Gelasian Pleistocene period |
1.8 Million years ago |
Homo erectus meaning "upright man" appeared |
600,000–350,000 years ago |
Neanderthal (Homo neanderthalensis) an extinct species or subspecies of the genus Homo which is closely related to modern humans |
350,000 years ago to present day |
Homo Sapiens - modern human |
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