Big bang

5, Klugh & Lorimer, History of Earth Timeline

  • (5 BYA) - Formation of Sun

    (5 BYA) - Formation of Sun
    A nearly spherical mass of burning gasses.
    Gravity pulled gasses toghether to form the Sun,
    The energy from the sun influenced and created life on Earth.
  • (4.6 BYA) - Earth Development

    (4.6 BYA) - Earth Development
    Earth formed and collided with space debris.
  • (4 BYA) - Earth Completely Formed

    (4 BYA) - Earth Completely Formed
    Earth is formed.
    Volcanoes emit gas forming an atmosphere.
  • (4 BYA) - Nano Life Begins

    (4 BYA) - Nano Life Begins
    Evidence of first cells.
  • (3.5 BYA) - Life Begins

    (3.5 BYA) - Life Begins
    Stromatoilites lived.
    Fossils found.
  • (3 BYA) - Bacteria Life Begins

    (3 BYA) - Bacteria Life Begins
    Cyanobacteria lives.
    Some forms of life becomes photosynthetic.
  • (2.2 BYA) - Earth 100% Developed

    (2.2 BYA) - Earth 100% Developed
    Earth looks like it does today.
  • (2 BYA) - Oxygen level reaches today's levels

    (2 BYA) - Oxygen level reaches today's levels
  • (2 BYA - 1.5 BYA) - Creation of Endosymbiosis

    (2 BYA - 1.5 BYA) - Creation of Endosymbiosis
    Method of energy synthesis.
  • (1 BYA) - Ozone formed

    (1 BYA) - Ozone formed
    Protects organisms from harmful UV rays so they can exist on land.
  • (1626-1697) - Redi's Developmental Experiment

    (1626-1697) - Redi's Developmental Experiment
    Redi concluded that when flies landed on meat they layed eggs that became maggots that then became adult flies.
  • (1590) - First Microscope

    (1590) - First Microscope
    Two Dutch scientists, Zaccharias Janssen and his son Hans, were experimenting with several lenses in a tube and discovered that nearby objects appeared greatly enlarged
  • (1924) - Oparin's hypothesis

    (1924) - Oparin's hypothesis
    Oparin hypothesized that the formation of amino acids and proteins from non-biological chemicals could have occurred in the conditions shortly after the formation of the Earth.
  • (1905) - Radiometric Dating

    (1905) - Radiometric Dating
    Used to determine the age of rocks and rock layers.
    Can only date rocks and rock layers up to 60,000 years old.
  • (1970s) - Cech's Discovery

    (1970s) - Cech's Discovery
    Cech studied the splicing of RNA in an unicellular organism called, "Tetrahymena thermophila." He discovered that an unprocessed RNA molecule could splice itself or copy itself.
  • (1952) - Urey and Miller Origin of Life

    (1952) - Urey and Miller Origin of Life
    They created an experiment that simulated the conditions of early Earth and tested for the occurence of chemical origins of life.
  • (1950-1960) - Fox's Experiment

    (1950-1960) - Fox's Experiment
    Fox studied the formation of peptide structures under conditions that might have existed in early Earth's history. He discovered that amino acids could spontaneously form small peptides. These amino acids and small peptides could form closed spherical membranes, called , "proteinoid microspheres," which show many of the basic characteristics of life.
  • (1966) - Lynn's Experiment

    (1966) - Lynn's Experiment
    Margulis believes that the symbionic relationships between different phylums between different organisms are the "driving force of evolution."
  • (1729-1799) - Spallazansi's Broth Experiment

    (1729-1799) - Spallazansi's Broth Experiment
    Spallanzani concluded that open-aired flasks, after being boiled, were exposed to microorganisms, that contaminated the broth. Broth that had a lid, was not effected by microorganisms.
  • (1822-1895) - Pasteur's Curved-neck Flask Experiment

    (1822-1895) - Pasteur's Curved-neck Flask Experiment
    Very similar to Spallazani's experiment, Pasteur's experiment was about microorganisms. He did everything the same, boiling broth and testing for contaminated samples, and he discovered that an uncovered curved-neck flask would not be effected by microorganisms.