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Earliest Evidence of Life (3.8 billions years years ago):
The first microscopic life forms, likely single-celled prokaryotes, appeared. -
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Formation of Earth’s Crust hand Ocean (4.5 billions years ago):
Description:The earth cooled forming a solid crust and liquid water, creating the first oceans. -
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Proliferation of Cyanobacteria (3.5 billions years years ago):
Cyanobacteria, or blue green algae, began producing oxygen via photosynthesis. -
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First Fossil Evidence (3.5 billions years ago)
Stromatolites p, layered structures formed by Cyanobacteria, are the earliest fossil evidence of life. -
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Evolution of Eukaryotic Cells (2.1 billion years ago)
More complex cells with a nucleus and organelles evolved. -
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Evolution of Prokaryotic Cells (2.1 billions years ago)
Prokaryotes, simple single celled organisms, dominated early earth. -
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Evolution of Multicellular Organism (1 billion years ago)
Description: Cells began working together, forming multicellular organisms. -
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Dinosaurs (230 to -66 million years ago)
Description: Dinosaurs dominated Earth for over 160 million years before their extinction. -
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Cambrian Explosion (540 million years ago)
Description: A rapid increase in the diversity of life forms occurred, including the first hard-bodied animals. -
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First Land Plants (470 million years ago)
Description: Plants adapted to survive on land, paving the way for terrestrial ecosystems.