A journey through history

By danii.gonz
  • Period: 4600 BCE to 544 BCE

    Precambiam

    Guide fossil: stromatolites
    Geological events: Much volcanic activity, formation of the Earth's crust and the formation of Rodimia.
    Climate events: Abrupt temperature changes and the first ice ages.
  • Early forms of life
    3800 BCE

    Early forms of life

    The first bacterias appear.
  • Cyanobacterias appear
    3500 BCE

    Cyanobacterias appear

    Cyanobacteria appear and produce atmospheric changes, producing oxygen.
  • First soft-bodied animals
    600 BCE

    First soft-bodied animals

    Early forms of complex life, soft-bodied animals (annelids, jellyfish, corals...) with multicellular organisms.
  • Period: 544 BCE to 250 BCE

    Paleozoic

    Guide fossil: Trilobites
    Geological events: Orogenies and the formation of Pangea.
    Climate events: Ice age and global warming.
  • First invertebrates
    542 BCE

    First invertebrates

    Cambrian: The first invertebrates with more complex body such as trilobites.
  • First fish
    468 BCE

    First fish

    Ordovician: The first jawless fish (Agnatha) appear and marine invertebrates predominate.
  • Fish domain
    444 BCE

    Fish domain

    Silurian: Fish dominate, the first ones with jaws appear, and the first non-flowering land plants appear.
  • First mass extinction
    440 BCE

    First mass extinction

    Silurian: First mass extinction where marine fauna lost more than 70% of its species.
  • First amphibians and insects
    370 BCE

    First amphibians and insects

    Devonian: The first amphibians and giant insects appeared, and the first fern forests also appeared.
  • Second mass extinction
    350 BCE

    Second mass extinction

    Carboniferous: Due to climate change, a mass extinction of some plants and amphibians occurred as the climate became drier.
  • First reptiles
    310 BCE

    First reptiles

    Carboniferous: Amphibians dominate and the first reptiles appear.
  • Third mass extinction
    252 BCE

    Third mass extinction

    Permian: The most devastating mass extinction, in which 90% of species were wiped out: trilobites, marine fauna, terrestrial animals... and the first synapsid mammals appear.
  • Period: 250 BCE to 65 BCE

    Mesozoic

    Guide fossil: Ammonites
    Geological events: Fragmentation of Pangaea and meteorite impact.
    Climate events: Temperature regulation and absence of glaciations.
  • First dinosaurs
    230 BCE

    First dinosaurs

    Triassic: The first dinosaurs and ancestors of mammals appear.
  • Dinosaurs dominate
    225 BCE

    Dinosaurs dominate

    Jurassic: Dinosaurs and reptiles dominated, birds appeared.
  • Fourth mass extinction
    201 BCE

    Fourth mass extinction

    Triassic - Jurassic: Large groups of ammonites, various reptiles, and a large marine fauna became extinct due to eruptions that released CO2.
  • Fifth mass extinction
    65 BCE

    Fifth mass extinction

    Cretaceous - Palaeogene: Dinosaurs and reptiles became extinct, and the first flowering plants appeared.
  • Period: 65 BCE to 1 CE

    Cenozoic

    Guide fossil: Nummulites
    Geological events: End of continental drift (Formation of the current continents) and orogenies.
    Climate events: Progressive cooling of the planet during the last ice ages (Ice Age).
  • Plants dominate
    56 BCE

    Plants dominate

    Palaeogene: Flowering plants, birds, and mammals are dominant.
  • Hominids appear
    7 BCE

    Hominids appear

    Neogene: The first hominids appear.
  • Homo sapiens appears
    2

    Homo sapiens appears

    Quaternary: Homo sapiens appears.