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* each section consisting of 200 million years is color coded
* every event occurring within the sections are matching the color code
* this is so that it is easy to see what events happened within each section of 200 million years

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4.6 BYA
Our solar system formed about 4.6 billion years ago from a dense cloud of interstellar gas and dust

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4.5 BYA
Earth, along with the other planets, is believed to have been born 4.5 billion years ago as a solidified cloud of dust and gases left over from the creation of the Sun.

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4.5 BYA

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4.6 BYA

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4 BYA

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2.5 BYA

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the appearance of oxygen in the atmosphere

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the appearance of oxygen in the atmosphere

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2.45 BYA
MIT scientists say that the Great Oxygenation Event (GOE), a period that scientists believe marked the beginning of oxygen's permanent presence in the atmosphere, started as early as 2.45 billion years ago.

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1.9 BYA
The cyanobacteria fossil record starts around 1.9 billion years ago with the most emblematic Proterozoic microfossil identified so far with certainty as a cyanobacterium, Eoentophysalis belcherensis

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1 BYA
The earliest fungi may have evolved about 1,000 million years ago or even earlier. They were probably aquatic organisms with a flagellum. Fungi first colonized the land at least 460 million years ago, around the same time as plants.

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710 MYA
At least one of them constituted what geologists call a Snowball Earth event, when the planet's surface was entirely, or almost entirely, frozen. Interspersed with non-glacial periods, the ice ages occurred between 2.4 and 2.1 billion years ago

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600 MYA
The "ozone layer," approximately 6 through 30 miles above the Earth's surface, reduces the amount of harmful UV radiation reaching the Earth's surface.

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appearance of first multi-cellular organisms

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appearance of first multi-cellular organisms

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600 MYA
The first known single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago.

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551 MYA

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541 MYA

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541 MYA

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543 MYA
All the analyses indicate that land plants first appeared about 543 million years ago, during the Cambrian period, when the development of multicellular animal species took off.

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525 MYA
Vertebrates originated about 525 million years ago during the Cambrian explosion, which saw a rise in organism diversity. The earliest known vertebrate is believed to be Myllokunmingia.

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485 MYA

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470 MYA
The first land plants appeared around 470 million years ago, during the Ordovician period, when life was diversifying rapidly. They were non-vascular plants, like mosses and liverworts, that didn't have deep roots

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443 MYA

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419 MYA

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412 MYA
Fossil evidence suggests that the first insects lived about 412 million years ago, during the Early Devonian Period.

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370 MYA
The first major groups of amphibians developed in the Devonian period, around 370 million years ago, from lobe-finned fish which were similar to the modern coelacanth and lungfish.

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310 MYA
The earliest known reptile is Hylonomus lyelli. It is also the first animal known to have fully adapted to life on land. Hylonomus lived about 310 million years ago, during the time we call the Late Carboniferous Period

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start of mississippian period (early carboniferous)

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start of mississippian period (early carboniferous)

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360 BYA

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320 MYA

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298 MYA

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252 MYA

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251 MYA

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250 MYA
A mass extinction event is when species vanish much faster than they are replaced

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242 MYA
First Dinosaurs. Approximately 240 million years ago, during the Triassic Period, the dinosaurs appeared, evolved from the reptiles

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200 MYA

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178 MYA
Mammals first appeared at least 178 million years ago, and scampered amid the dinosaurs until the majority of those beasts, with the exception of the birds, were wiped out 66 million years ago.

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145 MYA

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165 MYA
Fossil records suggest that originated 165 million years ago, while modern ones were orginated after the end of the Cretaceous period about 65 million years ago when dinosaurs died off.

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125 MYA
Fossil evidence indicates that flowering plants first appeared in the Lower Cretaceous, about 125 million years ago, and were rapidly diversifying by the Middle Cretaceous, about 100 million years ago.

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65 MYA - NOW

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65 MYA

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5-7 MYA
The first human ancestors appeared between five million and seven million years ago, probably when some apelike creatures in Africa began to walk habitually on two legs. They were flaking crude stone tools by 2.5 million years ago.

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2 MYA