-
5 BYA
Solar system began to form -
4.6 BYA
The Earth began its formation. It grew by colliding space debris. -
4 BYA
Volcanoes attmitted gas which formed to create the atmosphere -
4 BYA
Methanosarcin barkeri
Produces methane during metabolism, Archaea are thought to be similar to the types of cellullar life that first populated life. -
3.5 BYA
Lynga Cells
Fossils of stromatolites are are found as old as 3.5 BYA, the lyngya cells grew in layers called stromatolites. Lyngya cells are prokaryotic cells, theat a photosynthetic, and unicellular -
3 BYA
Some forms of life had become photostnthetic. -
2.2 BYA
Earth appeared much as it does today -
2 BYA
O2 levels reached today's levels -
1.5 BYA
Aerobic Prokaryote
Type of aerobic prokaryote was engolfed by and began to live and reproduce inside of a larger, anaerobic prokaryote. Theory is called Endosymbiosis. -
1 BYA
Ozone (O3) formed – protected organisms from harmful UV rays so they could exist on land -
1700-1800
Spallazani's Experiment
Spallazani realized that when you seal the glass container of broth it remains clean, but when you leave it open bacteria appears. -
1900- Present
Lynn Margullis proposed that early prokaryotic cells may have developed a mutually benificial relationship. -
1659 Thomas Crech
Found type of RNA the is found in some unicellular eurokatyotes to act as a chemical catalyst -
Urey and Miller
Set up experiments to test oparin's hypothesis -
Fox
Did extensive research on physical structures that may have given rise to the first cells -
Radiometric Dating
Techniques that can determine a range of plausibe dates for how old objects are. This is how they found out how old the earth is -
Lynn Margulis 1938
Proposed that earlier prokaryotic cells may have developed a mutually beneficial relationship -
First Microscopes 1590
Light Microscope that used optical lenses to magnify objects by bending light rays -
Oparin's Hypothesis
Stated how and where elements were assemble into organic compounds. Died before he ever got to test it -
1668
Redi's Experiment
Large amounts of the worlds carbon 14 decayed, Redi realized that when he allowed flies in his meat maggots appeared, and when he didn’t no maggots appeared -
1800-1900
Pasteur's Experiment
Pausture used curve necked beekers to show that gravity causes microorganisms to fall in, they do not just appear.
