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this was the very beginning of the earth

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Oxygen first popped up in the atmosphere, created by photosynthesis prokaryotic organisms known as cyanobacteria. This produced organic carbon that increased the oxygen in the ocean.

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Invertebrates popped up 3.5 BYA and first developed in the ocean. 3.4 BYA, cyanobacteria evolved, but the recorded fossil record has evidence of cyanobacteria evolving from 2.4 BYA.

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The Huronian Ice Age was the oldest ice age known and was home to only uni-cellular life forms.

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The first multicellular organism made its first appearance.

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Cyanobacteria made its first appearance.

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Fungi made their first appearance.

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Precambrian era (4.6 BYA to 590 MYA) happened, along with the Cryogenian ice age (850-635 MYA). Land animals made their first appearance (800 MYA) and the first Snowball earth happened (750 MYA).

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The Phanerozoic Eon, where the Ordovician-Sillurian extinction happened (440 MYA)
PALEOZOIC ERA
Paleozoic Era began, the end of the precambrian era happened. The formation of the ozone layer was formed by 3 oxygen atoms. It protected life from harmful UV radiation wavelengths and trapped oxygen in the atmosphere.
The Cambrian period began (505 MYA) and lasted for 51.4 million years. The appearance of the first plants came.
The Andean-Saharan Ice age happened (460-430 MYA)
The Ordovician period lasted for 45 million years and the appearance of the first vertebrates came.
The Silurian period also happened, lasting for 24.6 million years.

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The Devonian Extinction (365 MYA), the Persian-Triassic Extinction (250 MYA) , and the Triassic-Jurassic Extinction (210 MYA) happened.
The appearance of insects (400 MYA) and amphibians (490-360 MYA).
The Karoo Ice Age happened (360-260 MYA)
The Devonian period (360 MYA) lasted for 60.3 million years ago and the Carboniferous Period (320-286 MYA) lasted for 60 million years.
Reptiles made their first appearance (315 MYA)
MESOZOIC ERA
The permain period happened 248 MYA and the triassic period happened 213 MYA.
Dinosaurs made their first appearance during the Triassic period (230 MYA).

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The crotaceous-tertiary extinction happened 65 million years ago.
the Quaternary Ice Age started 2.6 million years ago and still continues on today.
Mammals made their first appearance 200 MYA, along with the appearance of flowering plants (256-149 MYA) and birds (150 MYA).
CENOZOIC PERIOD
The Jurassic period (144 MYA), Cretaceous period (65 MYA), Paleocene period (55.8 MYA), Eocene period (33.9 MYA), and the Oligocene period (23 MYA)
the first ancestors of humans appeared 7-5 million years ago.