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The solar system became a swirling mass of space dust.
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The Earth begins to form from gathering space debris.
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Earth has begun to fully from.
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the United States Constitution was formed.
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The first fossil evidence dates back to this time period.
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The first marine photosynthesis begiins
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Lots of available O2 in atmosphere.
Oxygen had been building up by photosynthesizing organisms, but chemical processes used most of it. -
first eukaryotes apperared around 1.5 billion years ago.
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oxygen levels have reached todays levels.
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By this time a complete ecosystem would have been formed by now, cosisting of lgae who produced, the protozoa consumed, and fungi and most bacteria decomposed.
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Sebastian Bach wrote and composed music.
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The American constitution was written.
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Alexzander I. Oparin and John B. S. Haldane- thought the early atmosphere contained ammonia, NH3: Hydrogen gas, water vapor, and compounds made of hydrogen and carbon such as methane.
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Thomas Cech discovered ribosomes
Urey and Miller-
Concluded that organic compounds might only have been possible in areas protected from the atmosphere, such as undersea hot springs. Fox- was a scientist that did extensive research on physical structures that could've given rise to the first cells. These structures are microspheres and coacervates.
Radiometric dating- The method of establishing the age of materials was created. It is in important in finding out how and when the Earth formed
