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Solar System was a swirling mass of gas that was pulled togather by gravity.
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Space debris collide to form planet earth and other planets as well
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earth is created, it's 700,000 times as long as the period of recorded history, 50 million times as long as average human life span.
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stromatolites form from coloniew of lynbgya
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some forms of life become photosynthetic
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earth started to look how it does today
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O2 levels reach todays level
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type of aeobic prokaryote was engulfed by and began to live and repoduce inside of a larger anaerobic prokaryote.
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Ozone formed, it protected organisms from harmful uv tays so they could exist on land
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Franceso Redit was the first to deny spontaneous generation and set up an experiment where he left out jars of meat to see if flies were borm from the meat and he discovered that the flies just lay their eggs in the meat. many scientists later on did experiments on the topic.
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robert hooke srudied nature closely by using an early light microscope.
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He was a french scientist that won the Paris academy of science award for clearing up the controversy of spontaneous generation. He boiled broth in a curve necked flask for 1 year and concluded th microorganisms contaminated the broth from the air. This was the accepted way of thinking after he proved everyone wrong.
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Oparin thought that the early atmosphere contained ammonia and at high temperature these gases might form simple organic compounds such as amino acids. He set up an experiment that later on american scientists will test.
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Set up experiment to test oparin's hypthesis and produced a variety of organic compounds. since then scientists use similar experiments to create new compounds
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Cech found a type of rna found in some unicellular eukaryotes that are able to act as a chemical catalyst. Later studies that were based on Cech's discovery indicate that ribozymes could act as catalysts for their own replication
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Proposed that early porkaryotic cells may have developed a mutaually beneficial reationship. evidence shows that 2 - 1.5 billion years ago a small aerobic prokaryote was enfulfed by and began to live and reproduce insid a larger one. This theory is called endosymbiosis.
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It is a method of establishing the age of materials, it determines the half life of an isotope.
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Spallanzani designed experiment to test spontaneous generation, he hypothesized that micro organisms formed not from air but from other micro organisms. Spallanzani boiled fresh broth and sealed 1 broth and left another open. He concluded that the boiled broth became contaminated obly when microorganisms from th air entered the flask. People disagreed with him saying he boiled it for to long and this allowed others to take a look into the matter
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Did extensive research on the physical structures that may have given tise to the first cells. The structures inlude microspheres which are orgivized as a membrane and coacervates which are collections of droplets that are compsed of lipids amino acids and sugars. These show important aspects of cellular life can arise without direction of genes
