When did it Happen?
Cretaceous Mass Extinction (end of the dinosaurs)
65 MYA
This was the first era of the Pre-Cambrian
Hadean
Trilobites lived during this period
Cambrian
This was the first period of the Mesozoic
Triassic
The most dominant species of the Cenozoic, and still holds dominance to this day.
Humans
The Mesozoic Era began at this time
252 MYA
This era saw the development of most of Earth's oceans
Archean
The first four-legged animals came about at this time
Devonian
This period of the Mesozoic saw the first large carnivores appear
Jurassic
The first primitive mammals appeared at this epoch
Paleogene
The Cenozoic Era began at around this time
65/66 MYA
The first living organisms appeared in this era
Archean
The first jawed fish came about at this time
Silurian
This period of the Mesozoic had dinosaurs like Coelophysis and Plateosaurus
Triassic
Humans appeared during this epoch
Holocene
The Last Glacial Maximum started at this time
23 thousand years ago
The first Multicellular organisms appeared during this era
Proterozoic
This is the Age of Giant Bugs
Carboniferous
This period of the Mesozoic had dinosaurs like Allosaurus and Brachiosaurus
Jurassic
Neogene
Modern humans came about around this time
50 thousand years ago
The name of the large object that crashed into Earth, forming the moon.
Thea
First vertebrates came about around this time
Ordovican
This period of the Mesozoic saw the development of flowering plants
Cretaceous
The current threat to insect, bird, and fish life.
Holocene Mass Extinction