first mammals-The earliest known mammals were the morganucodontids, tiny shrew-size creatures that lived in the shadows of the dinosaurs.
first dinosaurs- Approximately 230 million years ago, during the Triassic Period, the dinosaurs appeared, evolved from the reptiles.
first reptiles-The earliest known reptile is Hylonomus lyelli. It is also the first animal known to have fully adapted to life on land.
first vascular land plants- they gave birth to our atmosphere
first fish took on the vast seas
first signs of multi cellular animals-animals started walking the earth
Eukaryotic cell- cells that contain a nucleus and organelles, and are enclosed by a plasma membrane.
Red Beds began to be deposited lasting until 1800 mya
First sign of life on the planet-Stromatolites;a calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment,
Earth Forms-Earth formed and its crust cooled to become solid.