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Earth is formed (4.6 billion years ago)
The history of the Earth covers approximately 4.5 billion years from Earth%u2019s formation out of the solar nebula to the present. The earth was filled with lava and meteors. -
Archean
The first eon in the Earth's history is called the Archaean. It lasted until 2.5 billion years ago. -
Prokaryotic Cells (3.8 billion years ago)
3.8 million years ago the first prokaryotic cells are formed. Prokaryotics lack a cell nucleas or any other member bound organelles. -
Complex Cells (2 billion years ago)
2 billions years ago Comple Cells were formed. Eukaryotic are organisms who are organized into complex structures enclosed with membranes. -
Simple Animals (600 million years ago)
600 million years ago the first simple animals were formed. Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago. -
Amphibians (360 million years ago)
Amphibians were first introduced 360 million years ago. Amphibians are are cold-blooded animals that metamorphose from a juvenile, water-breathing form to an adult, air-breathing form. -
Mammals (200 million years ago)
The first mammals were introduced 200 million years ago. Mammals are a class of vertebrate animals whose name is derived from their distinctive feature, mammary glands, with which they feed their young. -
Birds (130 million years ago)
Birds were introduced 130 million years ago. are winged, bipedal, warm-blooded, vertebrate animals that lay eggs. -
Dinosaurs (65 million years ago)
The dinosaurs died out 65 million years ago. Dinosaurs were the dominant vertebrate animals of terrestrial ecosystems for over 160 million years. -
Humans (200,000 years ago)
Humans that look like what we look like today were introduced 200,000 years ago. Homo is the genus that includes modern humans and their close relatives.
