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Gas and dust floating in the universe pulled together by gravity to make the baby sun. This effected the whole universe, and that is how everything started. The remaining space debris collided to make the planets.
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Earth began to form and grow by colliding with space debris. This effected earth and it's growth.
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Organic molecules began to accumulate, this is known to be when rock and crystals began to form.
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Earth's surface cooled after all of the collisions of space debris, which melted the surface and the cooled. This effected how we are able to date when the collisions stopped and the cooling of the earth's surface began.
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Fossils of stromolites were dated back to 3.5 billion years ago. This is important because it is possible to date back how far organisms lived with the fossils.
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Some forms of life became photosynthetic.
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Earth started to look like it does today.
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O2 levels reached what they are today. That is important because if if they hadn't life would not be able to exist on earth.
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The Ozone (O3) formed. This protected organisms from harmful UV rays so that they could exist on land.
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The microscope was invented.
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Francesco Redi made an experiment that investigated spontaneous generation. His experiment involved meat and that maggots only appeared when adult flies had landed on it.
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Lazzaro Spallanzani held an experiment that tested the growth of microorganisms. His experiment consisted of two flasks that both had boiled broth. One flask was seal and stayed clear, the other was open and became contaminated with microorganisms aand became cloudy.
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Louis Pastuer conducted an experiment that was boiling broth in a curve-necked flask. The curve prevented any microorganisms from getting into the broth remained clear for up to a year. Once the neck was broken off, the broth became cloudy with in a day.
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Oparin's hypothesis said that gases in the early atmosphere are what make up the macromolecules that are essential to life.
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Harlod C. Urey and Stanley L. Miller preformed an experiment that had gases that presented earth's early atmosphere. This experiment produced a variety of organic compounds.
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Sidney Fox consuted extensive research on the physical structures that mat have given rise to the first cells.
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Lynn Margulis is a reashercher who proposed that early prokaryotic cells may have developed a mutually beneficial relationship.
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Discovery of Radiometric Dating. This helped to esteblish the time of when materials developed.
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Thomas Cech found that a type of RNA (in some unicellular eukaryotypes) is able to act as a catalyst, similar to the reaction of enzymes.
