Timeline: The Evolution

4500 BCE

Earth's Formation

4.500 million years ago.
The apparition of the earth was a very difficult and slow process.The christian tradition and other religions believe that God was the one who created Universe life in six days. This is known as creationism. But obviously this is a mythical explanation based on faith and not supported by scientiic evidence. Nowadays we know that the world was created by the big bang, about 13.800 million years ago.

600 BCE

Multicellular organisms. Cambrian life's explosion

600 million years ago.
After the process of cell differentation we obtained multicellular organisms that had specialized cells. This organisms use the sexual reproduction and are more able to adapt to other environments and they can have more variety of species, creating the biodiversity.

500 BCE

First vertebrates

500 million years ago.
The vertebrates originated during the Cambrian explosion.

200 BCE

Dinosaurs and mammals coexist

200 million years ago.
Scientists found an animal that lived at the same time than dinosaurs.

130 BCE

Aparition Sapiens Sapiens

130.000 years ago
This is the latest event of evolution by the moment, all of us are Homo Sapiens Sapiens.

65 BCE

Dinosaurs extinction

65.000 years ago.
Nowadays, after all this time, the cause of the mass extinction of the dinosaurs is a scientific mystery.

60 BCE

Apparition Primates

60.000 years ago.
At the beginning they were small animals but over time, they develope until they adapt to the environment.

4 BCE

The first organic molecules

4.000 million years ago.
Redi, Needham, Spallanzani and Pasteur, made an experiments to prove how appeared the organic matter in life, but till Stanley Miller, didn't made his experiment, it wasn't completly sure than organic molecules came from inorganic ones.

3 BCE

Life appears. Prokaryotic cells

3.500 million years ago
After eukaryotic cells, appeared the first living organisms, that some of them were prokaryotics.

2 BCE

Aparition Homo Erectus

2 million years ago.
After the apparition of primates, appeared the most older Homo that could walk, Homo Erectus.

1 BCE

Oxygen in the air

1.800 million years ago.
The oxygen disaster, was the first ever extinction, and a lots of photosynthetic bacterias died.

1 BCE

Fisrt Eukaryotic cells

1.400 million years ago
After the oxygen disaster, appeared the eukayotic cells, more complex cells, with the cell membrane and more organelles. At first they were unicellular.