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5 BYA (formation of the solar syatem.)
It was a mass of swirling dust and debris -
4.6 bya (the earth began to form)
earth formed by a large amount of dust and debris coming together. -
4 bya (organic molecules)
organic molecules started to accumulate archae. -
4 bya (long time)
700000 times as long a period of recorded history. 50 million times as long as a human life -
3.5 bya (stromanict layers)
stromantict layers and fossiales found from 3.5 billion years ago -
3 bya (photosynthetic)
forms of life became photosynthetic, this is inffered by trace chemicle evidence. -
2.2 bya (earth)
earth started to look the way it is today. -
2 bya(oxygen)
oxegen levels reached todays levels. -
2-1.5 bya(endosymbiosis)
small aerobic prokaryotes start to live inside larger anaerobic prokaryotes this was called endosymbiosis -
1 bya (ozone)
ozone formed protecting us from uv rays. -
Disproved spontaneus combustion (1626)
Francesco redi was first to deny the spontaneus generation theory. Created meat experiment w/ flies -
Robert Hooke (1665)
Robert hooke studied nature by using an early light microscope. -
(1729) Spallanzini
Created experiment with a sealed vial of broth and a open vial. proved spontaneus generation -
(1872) Louis Pasteur
Won award for clearing up the spontaneus generation theory. -
(1894) Soviet Alexander Oparin
Thought that early atmosphere contained ammonia & at high temperatures these gases might have formed simple organic compounds such as amino acids -
(1900s) Lynn Marulis
okaryotic cells may have developed a mutually beneficial relationship. -
(1953) Urey and Miller
Concluded that organic compounds might only have been possible in areas protected from the atmosphere, such as undersea hot springs. -
Sidney Fox(1900)
Sidney Fox did extensive research on physical structures that could have given rise to the first cells. These structures are microspheres and coacervates. -
(1980s) Thomas Cech
Thomas Cech discovered ribozymes. RNAs molecule that can act as a catalyst and promote a specific chemical reaction. His findings support the hypothesis that life could have started with self-replicating molecules of RNA