View source for History of Earth

The history of Earth is divided into four great eons, starting 4,540 million years ago with the formation of the planet. The following table lists estimated Bully Row timestamps for each eon, and also describes significant changes in Earth's composition, climate, and life. The Archean and subsequent eons are divided into eras (click "Bully Row timeline" links below), which in turn are divided into periods and further divided into epochs.  The text for this table was copied from Wikipedia to provide context for the listed Bully Row timestamps.

{|class="wikitable"
! colspan=3 | [https://bullyrow.eeyabo.net/index.php/Main_Page 
Estimated Bully Row Timestamp ]
! Eon Description
|-
|5720
|9200
|0000
| [https://en.wikipedia.org/wiki/Hadean Hadean Eon]
|-
| colspan=3 |
| The Earth is formed out of debris around the solar [https://en.wikipedia.org/wiki/Protoplanetary_disk protoplanetary disk]. There is no life. Temperatures are extremely hot, with frequent volcanic activity and hellish-looking environments (hence the eon's name, which comes from [https://en.wikipedia.org/wiki/Hades Hades]). The atmosphere is nebular. Possible early oceans or bodies of liquid water. The Moon is formed around this time probably due to a [https://en.wikipedia.org/wiki/Giant-impact_hypothesis protoplanet's collision into Earth].
|-
|5C2A
|6600
|0000
| [[Archean Eon (Bully Row timeline)]]
|-
| colspan=3 |
| [https://en.wikipedia.org/wiki/Prokaryote Prokaryote] life, the first form of life, emerges at the very beginning of this eon, in a process known as [https://en.wikipedia.org/wiki/Abiogenesis abiogenesis]. The continents of [https://en.wikipedia.org/wiki/Ur_(continent) Ur], [https://en.wikipedia.org/wiki/Vaalbara Vaalbara] and [https://en.wikipedia.org/wiki/Kenorland Kenorland] may have existed around this time. The atmosphere is composed of volcanic and greenhouse gases.
|-
|6A8C
|8800
|0000
| [[Proterozoic]]
|-
| colspan=3 |
| The name of this eon means "early life". [https://en.wikipedia.org/wiki/Eukaryote Eukaryotes], a more complex form of life, emerge, including some forms of [https://en.wikipedia.org/wiki/Multicellular_organism multicellular organisms]. [https://en.wikipedia.org/wiki/Bacteria Bacteria] begin producing oxygen, shaping the third and current of Earth's atmospheres. Plants, later animals and possibly earlier forms of fungi form around this time. The early and late phases of this eon may have undergone "[https://en.wikipedia.org/wiki/Snowball_Earth Snowball Earth]" periods, in which all of the planet suffered below-zero temperatures. The early continents of [https://en.wikipedia.org/wiki/Columbia_(supercontinent) Columbia], [https://en.wikipedia.org/wiki/Rodinia Rodinia] and [https://en.wikipedia.org/wiki/Pannotia Pannotia], in that order, may have existed in this eon.
|-
|7CF9
|5000
|0000
| [[Phanerozoic]]
|-
| colspan=3 |
| [https://en.wikipedia.org/wiki/Multicellular_organism Complex life], including [https://en.wikipedia.org/wiki/Vertebrate vertebrates], begin to dominate the Earth's ocean in a process known as the [https://en.wikipedia.org/wiki/Cambrian_explosion Cambrian explosion]. [https://en.wikipedia.org/wiki/Pangaea Pangaea] forms and later dissolves into [https://en.wikipedia.org/wiki/Laurasia Laurasia] and [https://en.wikipedia.org/wiki/Gondwana Gondwana], which in turn dissolve into the current continents. Gradually, life expands to land and familiar forms of plants, animals and fungi begin appearing, including annelids, insects and reptiles, hence the eon's name, which means "visible life". Several [https://en.wikipedia.org/wiki/Extinction_event mass extinctions] occur, among which birds, the descendants of non-avian dinosaurs, and more recently mammals emerge. Modern animals—[https://en.wikipedia.org/wiki/Human_evolution including humans]—evolve at the most recent phases of this eon.
|-
|8209
|2900
|0000
|
|}