By Alexander Holbrook
The Planet earth forms from the accretion disc revolving around the young sun
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 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 surface of the Earth cools enough for the crust to solidify. The atmosphere and the oceans form.
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
Scientists believe hetertophic cells began to use up all the biological molecules in their own environment
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
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.
Earliest dinosaurs (prosauropods), first cardiid bivalves, diversity in cycads, bennettitaleans, and conifers. First teleost fishes.
Cells within colonies are often connected by strands of cytoplasm that integrate into the colony
The First Eucaryotic cells appear. Eukaryotes contain membrane-bound organelles with diverse functions, probably derived from prokaryotes engulfing each other via phagocytosis.
The Ozone Layer is formed through the accumulation of atmospheric oxygen
The earliest fungi is discovered
The first fish is discovered.
Simple multicellular organisms evolve mostly consisting of cell colonies of limited complexity. First multicellular organism is red alage.
The first homosapiens walk the planet