Timeline

MILLION YEARS AGO

EVENT

3500 ► Earliest evidence for fossils -

stromatolites made by microbes

2000 ► First seaweeds

1300 ► First seaweeds in Australia

550 ► Ediacaran fossils

- the gutless wonders

530 ► First trilobites and other fossils with armour

520 ► Soft-bodied fossils from the Burgess Shale

450 ► Arthropods - first animals to walk on land

370 ► Gogo fish and first vertebrates on land (amphibians)

340 ► World's first forests and first flying insects

320 ► First mammal-like reptiles

230 ► First mammals and first dinosaurs

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