The Evolution of Life on Earth

By Alexander Holbrook

Main

The Panet Earth Forms

4600000000 bc

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

4500000000 bc

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

4100000000 bc

The surface of the Earth cools enough for the crust to solidify. The atmosphere and the oceans form.

Organic Molcules

4000000000 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

Bilogical Membranes

4000000000 bc - 3500000000 bc

Procaryotic Heterotrophic Cells

3500000000 bc - 2500000000 bc

Scientists believe hetertophic cells began to use up all the biological molecules in their own environment

Beginning of Photosynthesis

3500000000 bc

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 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

2250000000 bc

Earliest dinosaurs (prosauropods), first cardiid bivalves, diversity in cycads, bennettitaleans, and conifers. First teleost fishes.

Colonial Organisms Devolop

1500000000 bc

Cells within colonies are often connected by strands of cytoplasm that integrate into the colony

Eucaryotic cell organisms develop

1500000000 bc

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

1150000000 bc

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

560000000 bc

The earliest fungi is discovered

Rise fo the amphibians

350000000 bc

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.

Homosapiens Exist

5000000 bc

The first homosapiens walk the planet