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During this time the solar system was a swirling mass of gas and dust. Over time, most material was pulled together by gravity and formed the sun.
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The Earth was formed during this time through collisions of space debris.
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On the Earth, rocks and crystals were beginning to form. Organic molecules also began to accumulate.
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Archaea are thought to be similar to the types of cellular life that first populated Earth.
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Lynbgya cells often grow in colonies and form layered structures called stromatolites began to form and develop. Life is beginning.
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Some forms of life began to become photosynthetic.
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Earth for the most part looks the same way it does now.
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Oxygen levels reach today's levels.
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Around this time aerobic prokaryote's were beginning to reproduct.
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Ozone forms, which protects organisms from harmful UV rays so they can exist on land.
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The first microscope is used to discover that microorganisms are simple in structure and amazingly numerous and widespread.
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He noticed and describe the different developemental forms of flies.
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He designed an expierement to test the hypothesis of spontaneous genereation of microorganisms,
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He made a curved necked flask that allowed the air inside the flask to mix with air outside the flask. The curve in the neck of the flask prevented solid particles from entering the body of the flask.
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She proposed that early prokaryotic cells may have developed a mutually bennifical realtionship.
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He did extensive research on the physical structures that may have given rise to the first cells.
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It is a technique that establishs the age of a material. Scientists can now look at ages of rocks to establish years that thet happened.
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He hypothesised at high temperatures gases might have formed simple organic compunds such as amino acids. It would ultimatly have resulted in the macromolecules essential to life such as proteins.
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The tested the hypothesis of Oparin. Their expierement produced a variety of organic compounds including amino acids.
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He found that a type of RNA found in unicullular eukaryotes is able to act as a chemical catalyst. He used the term Ribozyme for an RNA molecule.
