When humanity seeks its place in the universe
Humanity would be born to save the universe. Indeed in the face of its destruction in three billion years, the definitive weapon to survive is the man.
The creation of the universe
The universe has existed for 15 billion years thanks to the Big Bang. After the action of gravitation, clouds of atoms condense and give birth to the first galaxies. Stars and planets as we know them were formed after 5 billion years.
As for the Earth, it exists since 4.6 billion years.
The creation of life on Earth
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In its early days, the Earth was a ball of lava melt with an atmosphere of water vapor and toxic gases. The first multicellular organisms appeared on Earth 1.3 billion years ago, 3 billion years after the creation of the planet, and 14 billion years after the beginning of the universe.
500 million years later, the first "animals", shell-less molluscs, diatoms and corals appear.
300 million years later, insects, amphibians and reptiles emerge as mutant reptiles turn into dinosaurs.
Mammals make their appearances during the extinction of the dinosaurs. Some of them have mutated into birds.
The appearance of man
The most distant ancestors of man appeared 4 million years ago. The present man appeared 200,000 years ago. For 194 000 years prehistory took place.
Then history appears with several periods: Antiquity, the Middle Ages, Modern Times and the Contemporary Period.
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Last update on December 21, 2017