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LIVING BEINGS EVOLUTION
Transcript of LIVING BEINGS EVOLUTION
The Earth is formed
WATER, the main ingredient for life, arrives to the Earth, brought by asteroids.
3.8 billion years ago
In few deep oceans, Stromatolites (bacterias) make photosynthesis for the first time.
OXYGEN is formed.
Rodinia, the first great continent is formed.
SNOWBALL EARTH, the longest and hardest Ice Age in the history that covered all the Earth. It lasted 15 million years.
Plants everywhere in the ocean depths.
"Cambrian Explosion", swarms, spoons, wiwaxia...
The first spine appears in a living being: "Pilayas"
Gonduana (continent), It has an average temperature of 30ºC and O2 in the atmosphere.
The complete Ozone layer is formed.
The moss appears on the Earth surface. The first terrestrial plants.
Tetrapods take the Earth surface.
Pangea continent is formed now.
Dynosaurs, in the longest era, take the surface of the Earth.
Dinosaurs remain in the Earth.
A 10 km diameter meteorite, acting as millions of nuclear bombs impact on the Earth.
All dinosaurs die.
Small mammals have survived.
Darwinius massile, that will evolve into simians and finally humans.
The Earth is almost the same as now.
Hymalaya mountain range is formed.
First Rivers from water in Hymalaya tops.
Our planet as it is now, but without human beings.
Simians appear in Africa, full of vegetation and wet.
It becomes an enormous savannah.
Simians become walking on two feet.
Homo Erectus appears.
70,000 years ago
Homo Sapiens goes out from Africa to Asia And Europe.
40,000 years ago
Europe is all frozen in summer time. Ice Age. It lasts 20,000 years.
6,000 years ago
Ice return to the Poles.
Now, the Earth is as nowadays.
Amino acids arrive to the Earth from other parts in the Universe. They arrive to the ocean depths.
Unicellular bacteria, the first living beings appears.
IGNACIO GARCÍA GUERRA 1º BACH B CMC
unit 2: Life on earth. Evolution