The Evolution

Earth's Formation

4500 BCE

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.

Multicellular organisms. Cambrian life's explosion

600 BCE

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.

First vertebrates

500 BCE

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

Dinosaurs and mammals coexist

200 BCE

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

Aparition Sapiens Sapiens

130 BCE

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

Dinosaurs extinction

65 BCE

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

Apparition Primates

60 BCE

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

The first organic molecules

4 BCE

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.

Life appears. Prokaryotic cells

3 BCE

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

Aparition Homo Erectus

2 BCE

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

Oxygen in the air

1 BCE

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

Fisrt Eukaryotic cells

1 BCE

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.

Aparition Homo Sapiens

1 BCE

300.000 years ago.
After Homo Erectus, but before Homo Sapiens Sapiens.