Solar system

the universe of the world

By Dr.Nick
  • First Microscope

    Hans Jansen and his son Zacharias Jansen invented the compound microscope.
  • Galileo's Microscope

    Galileo Galilei develops a compound microscope with a convex and a concave lens.
  • Microscope Origin

    Giovanni Faber of the Linceans coins the word microscope
  • Francesco Redi

    Disproved the "vital force" theory. Performed experiments with maggots, meat, and sealed containers.
  • Lazzaro Spallanzani

    First to perform in vitro fertilization. Researched the theory about the spontaneous generation of cellular life. Paved the way for later research by Louis Pasteur, who defeated the theory of spontaneous generation.
  • Louis Pasteur

    Invented a method to stop milk and wine from causing sickness with Claude Bernard, a process that came to be called pasteurization. Ready-to-eat foods: microbial concerns and control measures
  • Radiometric dating

    A technique used to date materials based on a comparison between a naturally occurring radioactive isotope and its decay products, using known half-lives. Chronology of Radiometric Dating: Ernest Rutherford suggests that uranium/helium or uranium/lead ratios could theoretically be used to compute the age of rocks.
  • Alexander Oparin

    Alexander Oparin - From Wikipedia: Put forward a theory of life on Earth developing through gradual chemical evolution of carbon-based molecules in primordial soup
  • Miller–Urey experiment

    An experiment that simulated conditions theorized to be present on the early Earth, and tested for abiogenesis.
  • Lynn Margulis

    Known for her theory on the origin of eukaryotic organelles, and her contributions to endosymbiotic research. Her work is what is now generally accepted for the theory of endosymbiosis.
  • Thomas Cech

    Shared the 1989 Nobel prize in chemistry with Sidney Altman, for their discovery of the catalytic properties of RNA
  • 5 Billion years ago

    5 Billion years ago
    The solar system was just a swirling mass of gas and dust. the material over time pulled together due to gravity and the sun was created. The same happened for earth and then in later years the planet grew.
  • 4.6 Billion years ago

    4.6 Billion years ago
    This is the time in witch the earth was further developing and the materials were formed all over the earth.
  • 4 Billion years ago

    4 Billion years ago
    Isotopes of the molecules and elements began to form.
    The Archaea bacteria were the first organisms to populate the Earth. They thrive in extremely harsh conditions.
  • 3.5 Billion years ago

    3.5 Billion years ago
    Fossils of stromatolites (layered structures created from bacteria that grows in colonies) were discovered from this time period.
  • 3 Billion years ago

    3 Billion years ago
    Some forms of life became photosynthetic.
  • 2.2 Billion Years ago

    2.2 Billion Years ago
    O2 begins to form on the earth.
  • 2 Billion Years Ago

    2 Billion Years Ago
    O2 levels reached today’s levels!
  • 1.5 Billion Years Ago

    1.5 Billion Years Ago
    The beginning of eukaryotes. Believed to be when endosymbiosis (a small, aerobic prokaryotic organism was engulfed by a larger, anaerobic prokaryote; the two developed a productive environment for each other) began.
  • 1 Billion Years Ago

    1 Billion Years Ago
    Ozone (O3) formed – protected organisms from harmful UV rays so they could exist on land