Earth History
Published on Nov 19, 2015
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Earth History
by: Kloei Lovan
Earth is Born
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- 4.5 billion years ago
- Formed from cloud of dust and rock
- Rocks collided then formed gravity over time.
- Planet collides with Earth chunks form moon.
- Cooled, solidified, allowing water to exist on surface [1]
The Great Oxidation
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- Bacteria harnessed sunlight.
- Carbon dioxide + water = sugar. [2]
- Oxygen may have caused 1st "Snowball Earth".
- Oxygen stripped green house gases.
- 2.3 billion years ago. [3]
The First Birds
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- Birds evolved from feathered dinosaurs.
- Archaeopteryx, famous early bird.
- Archaeopteryx is 150 million years old
- Xiaotingia and Aurormis found in China.
- Started 160 million years ago.
- Came from theropod dinosaurs [4]
