The Planet earth forms from the accretion disc revolving around the young sun
The Earliest Life Appears
4500000000 bc - 3500000000 bc
The earliest life appears, possibly derived from self-reproducing RNA molecules. The replication of these organisms requires resources like energy, soace and smaller building blocks.
The Moon is formed
The moon is formed when the planet earth and planet Theia collide, sending a very large number of moonlets into orbit around the young Earth which eventually coalesce to form the moon.
The Earths Surface Cools
The surface of the Earth cools enough for the crust to solidify. The atmosphere and the oceans form.
4000000000 bc - 3500000000 bc
Biological molecules floating around ina a shallow sea of water. As their concentrations are increased, they reacted with each other to form more complex molecules
Beginning of Photosynthesis
Beginning of photosynthesis by blue-green algae which releases oxygen molecules into the atmosphere and steadily works to strengthen the ozone layer and change the Earth's chemically reducing atmosphere into a chemically oxidizing one
Procaryotic Heterotrophic Cells
3500000000 bc - 2500000000 bc
Scientists believe hetertophic cells began to use up all the biological molecules in their own environment
Procaryotic Autotrophic Cell Organisms Develop
2500000000 bc - 2000000000 bc
The first procaryotic cell organisms develop. Theses first organisms are chemoautotrophs: They use carbon dioxide as a carbon source and oxidize inorganic materials to extract energy.
The Earliest Dinosaurs
Earliest dinosaurs (prosauropods), first cardiid bivalves, diversity in cycads, bennettitaleans, and conifers. First teleost fishes.
Colonial Organisms Devolop
Cells within colonies are often connected by strands of cytoplasm that integrate into the colony
Eucaryotic cell organisms develop
The First Eucaryotic cells appear. Eukaryotes contain membrane-bound organelles with diverse functions, probably derived from prokaryotes engulfing each other via phagocytosis.
First Monoreme Mammals
The formation of the Ozone Layer
580000000 bc - 540000000 bc
The Ozone Layer is formed through the accumulation of atmospheric oxygen
Earliest Fungi is discovered
The earliest fungi is discovered
Rise fo the amphibians
Rise of the Fish
50000000 bc - 4500000 bc
The first fish is discovered.
Simple Multicelluar Organisms Evolve
10000000 bc - 5000000 bc
Simple multicellular organisms evolve mostly consisting of cell colonies of limited complexity. First multicellular organism is red alage.