-
5 B.Y.A
The solar system began to form -
3.5 B.Y.A
lynbgya grew and formed layered structures called stromatolites -
4 B.Y.A,
The oldest known rocks and crystals were formed -
4 B.Y.A
The archea we have today are thought to be similar of that we had 4 B.Y.A -
1 B.Y.A.
Ozone formed- protected organisms form harmful UV rays so they could exist on land -
4.6 B.Y.A.
The earth began to form and it grew by colliding with space debris -
3 B.Y.A.
Some forms of life were photosynthetic -
2.2 B.Y.A.
The earth probobly looked alot like it des today -
2 B.Y.A
O2 levels reached todays levels -
Between 1.5 and 2 B.Y.A
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Francesco Redi
Francesco Redi noticed and described the different developmental forms of flies. He also observed that the worm-like maggots eventually turned into flies. -
Lynn Marhulis
She is best known for her theory on the origin of eukaryotic organelles, and her contributions to the endosymbiotic theory, which is now generally accepted for how certain organelles were formed. She is also associated with the Gaia hypothesis, based on an idea developed by the English environmental scientist James Lovelock. -
Oparin’
Oparin’s hypothesis suggested that if the primitive atmosphere was reducing (as opposed to oxygen-rich), and if there was an appropriate supply of energy, such as lightning or ultraviolet light, then a wide range of organic compounds might be synthesised. -
Fox
Fox studied physical structures and may have given rise to the first cells. -
Pasteur
Pasteur set up his prize winning experiment. Pasteur set up a flsk experiment to prove that spontaneous generation is a lie. -
Thomas Cech
Thomas Cech is a chemist who shared the 1989 Nobel prize in chemistry with Sidney Altman, for their discovery of the catalytic properties of RNA. -
Miller and Urey
The Miller and Urey experiment which
was an experiment that simulated hypothetical conditions thought at the time to be present on the early Earth, and tested for the occurrence of chemical origins of life. Specifically, the experiment tested Alexander Oparin's and J. B. S. Haldane's hypothesis that conditions on the primitive Earth favored chemical reactions that synthesized organic compounds from inorganic precursors. -
Robert Hooke
Robert Hooke used and early light microscope to study a small slice of cork. The light microscope bends light rays and that allows the object being studied to seem larger. He was able to use this to draw what cells look like. -
Lazzaro Spallanzani
Lazzaro Spallanzani designed an experiment to test the hypothesis of spontaneous generation of microorganisms. Spallanzani hypothesized that microorganisms formed not from air but from other microorganisms.
