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(5 billion year ago) Creation of the Solar System
Gas and dust floating in the universe pulled together by gravity to make the baby sun. This effected the whole universe, and that is how everything started. The remaining space debris collided to make the planets. -
(4.6 billion years ago) EARTH!
Earth began to form and grow by colliding with space debris. This effected earth and it's growth. -
(4 billion years ago) Organic Molecules
Organic molecules began to accumulate, this is known to be when rock and crystals began to form. -
(4 billion years ago) Earth's cooling
Earth's surface cooled after all of the collisions of space debris, which melted the surface and the cooled. This effected how we are able to date when the collisions stopped and the cooling of the earth's surface began. -
(3.5 billion years ago) Fossilize me Cap'n!
Fossils of stromolites were dated back to 3.5 billion years ago. This is important because it is possible to date back how far organisms lived with the fossils. -
(3 billion years ago) Life and Photosynthesis
Some forms of life became photosynthetic. -
(2.2 billion years ago) Look a like-->Earth
Earth started to look like it does today. -
(2 billion years ago) O2 gas
O2 levels reached what they are today. That is important because if if they hadn't life would not be able to exist on earth. -
(1 billion years ago) the Ozone Layer, new and without holes!
The Ozone (O3) formed. This protected organisms from harmful UV rays so that they could exist on land. -
(mid 1600's) Micoscopic discovery
The microscope was invented. -
(1626-1697) Redi!? Set!? GO!!!
Francesco Redi made an experiment that investigated spontaneous generation. His experiment involved meat and that maggots only appeared when adult flies had landed on it. -
(1729-1799) Spallanzani
Lazzaro Spallanzani held an experiment that tested the growth of microorganisms. His experiment consisted of two flasks that both had boiled broth. One flask was seal and stayed clear, the other was open and became contaminated with microorganisms aand became cloudy. -
(1822-1895) cows drinking broth in the Pastuer.
Louis Pastuer conducted an experiment that was boiling broth in a curve-necked flask. The curve prevented any microorganisms from getting into the broth remained clear for up to a year. Once the neck was broken off, the broth became cloudy with in a day. -
(1920's) Hypothesis with Oparin
Oparin's hypothesis said that gases in the early atmosphere are what make up the macromolecules that are essential to life. -
(Urey-1893-1981, Miller 1930- still alive) Urey and Miller
Harlod C. Urey and Stanley L. Miller preformed an experiment that had gases that presented earth's early atmosphere. This experiment produced a variety of organic compounds. -
(1912-1998) Fox
Sidney Fox consuted extensive research on the physical structures that mat have given rise to the first cells. -
(1938- still alive) Margulis
Lynn Margulis is a reashercher who proposed that early prokaryotic cells may have developed a mutually beneficial relationship. -
(1949) Radiometric romance & Dating
Discovery of Radiometric Dating. This helped to esteblish the time of when materials developed. -
(1947- still kickin') Cech
Thomas Cech found that a type of RNA (in some unicellular eukaryotypes) is able to act as a catalyst, similar to the reaction of enzymes.
