Major Events on Eras
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Palezoic Era
Mass extinction
Pangea
Animals and Plant Evolve Further
Animals Reach Land
First Vertebrates and Plants
The Cambrian Explosion
Continents moved and formed Pangea
Vertebrates and invertebrates lived on the Devonian Sea
First vertebrates appeared
Plants and ferns grew abundantly
90% of all ocean species and 70% of land species died.
Some scientists believed it was caused by volcanoes erupting, and others believe it was caused by climate changes.
The amniote egg evolved
Reptiles appeared
Insects evolved into new forms
The amniote egg evolved
Reptiles appeared
Insects evolved into new forms
Many new life forms appeared in a very short time
Organisms with hard shells evolved
All animals lived in the sea and were invertebrates
Mesozoic Era
Age of Reptils
First mammals
Reptiles And Birds
Flowering Plants
Another Mass extintion
Birds started replacing flying dinosaurs
Flowering plants started evolving
Very small mammals appeared
The first dinosaurs appeared
Dinosaurs were dominant
Oceans were filled with diverse forms
Birds appeared
Cenozoic Era
Ice Ages
Humans
Mammals Thrive
Because of the cool climate ice ages were caused
Large sheets of ice appeared
At the end, sea levels rose and the ice melted
Mammals flourished, some birds and mammals became very large
Earth's climate became cooler over time
Flowering plants and grasses became more dominant
Continents drifted apart, whales and dolphins evolved.
An ancestor of modern day humans appeared in the fossil record of the Quaternary period.
Modern day humans appeared around 190,00 years ago
By about 12,000 to 15,000 years ago, all continents were visited by humans except Antartica
Wiped out dinosaurs
Scientists believed an asteroid hit Earth
Many reptiles were able to survive the mass extinction, they were successful in the Mesozoic Era