4.6 billion years ago

The earth and other planets in the solar system began to form in the solar nebula. This process lasted for 10 to 20 million years, and gravity brought these rocks together to form the earth.

4.5 billion years ago

A young planet named "Teia" came straight at the earth and had a fatal collision with it. The moon is made of dust and rocks. It is much closer than the moon we are familiar with now, only 22,000 kilometers away from the earth, not 400,000 kilometers.

3.9 billion years ago

The earth is being attacked by debris generated during the formation of the solar system. These meteors have small water droplets inside, which look like deadly bombs, but they give the key elements of life on earth.

3.8 billion years ago

Meteorites dissolve, releasing minerals, carbon and amino acids. These substances enter the seabed from outer space. Seawater seeps into the ground and the temperature becomes higher. Collect minerals and gases along the way. Add minerals and chemicals brought by meteorites and water becomes a chemical solution. We don't know the specific method or time. In short, these chemicals combine to create life. Now the water is full of microorganisms. These single-celled bacteria are the earliest life forms on earth.

3.5 billion years ago

Blue-green algae evolved a molecular mechanism to produce a by-product oxygen by absorbing sunlight and water, and the concentration of oxygen continued to increase in the next 2 billion years.

750 million years ago

Heat overflows from the molten core, making the crust stretch weaker. Moving a few centimeters a year, the huge continent is split in two.

650 million years ago

The earth has entered what some scientists call the snowball earth period, which they think is the longest and coldest ice age in the history of the earth.

After 654.38+0.5 million years, the ice began to melt. When the earth freezes, the ultraviolet rays of the sun interact with water molecules in ice, producing a chemical substance rich in oxygen-hydrogen peroxide. At this time, with the melting of ice, hydrogen peroxide released a lot of oxygen, and the earth gradually woke up.

540 million years ago

In the ocean full of oxygen, those primitive bacteria have evolved, which is an active stage of earth's geological activities, that is, the CAMBRIAN explosion period. Now there are plants everywhere, the oxygen concentration is rising and the creatures are getting bigger.

460 million years ago

The concentration of oxygen is similar to that of the present atmosphere. This land should be full of plants and animals, but there is nothing here except some algae. The sun shines on the ground with deadly radiation, and the complex life we see in the sea can't survive on land. However, 50 kilometers from the ground, where sunlight enters the earth's atmosphere, there is a strange phenomenon. After being irradiated by sunlight, oxygen becomes a gas called ozone. After 65.438+0.2 billion years, the ozone layer gradually became thicker, blocking more solar radiation, and life from radiation damage flourished.

375 million years ago

This is a strange fish named "Taleq Fish". It cocked its neck and used its fins as its legs. It came out of the water and set foot on the land full of plants. It was one of the first marine animals to land.

250 million years ago

The surface temperature is getting higher and higher, the underground pressure is huge, huge geothermal columns are pouring out from the depths of the earth, lava is squeezed out from cracks in the earth's crust, lush heaven has become a hell of death, and the earth has experienced the largest extinction in history. People call this period "Permian mass extinction". 96% of marine life and 70% of terrestrial vertebrates on the earth have become extinct.

230 million years ago

After extinction, the earth began to come back to life, and one species will rule the earth, which is unprecedented. He is a dinosaur.

65 million years ago

A huge space rock, it is about ten kilometers long, bigger than Mount Everest, and its speed exceeds 70,000 kilometers per hour.

Straight to the earth, it was dark for a while, the temperature plummeted, the rain poured down, and flash floods broke out.

The mudslide swept away the dinosaurs and buried them. In the next few months or even years, the sky is still dusty and covered with dark clouds. Because of the lack of sunshine all the year round, the earth enters a low temperature, and the vast land is silent for a time, dominating the global terrestrial ecosystem. The extinction time of dinosaurs exceeded 654.38+0.6 billion years.

50 million years ago

Primates have rapidly evolved radially, from lower primates (such as lemurs and tarsiers) to higher primates (such as apes, such as macaques, golden monkeys, baboons and apes).

30 million years ago

Apes began to appear, living in groups in tropical and subtropical forests. The earliest archaeopteryx and Egyptian apes found in Egypt already have some characteristics of apes.

Five to eight million years ago

Some chimpanzee-like ape species, in the joint zone between rainforest and savanna, established the founder group, gradually evolved into Australopithecus, and began the history of primitive human beings.

40 thousand years ago

The concentration of carbon dioxide in the earth's orbit and the water flow in various places changed, which made the earth's temperature lower and the earth entered an ice age.

Twenty thousand years ago

Glaciers suddenly stopped moving, and most parts of the northern hemisphere were covered with 2500 meters thick ice, and several 654.38 billion cubic meters of water condensed into ice.

6000 years ago

The ice returned to the South Pole and the North Pole. After a long journey of 4.6 billion years, we finally returned home. This is our world, our time and space, and successive victories and disasters have gradually turned the earth into what it is today, and human beings have appeared. But the story of the earth continues. Many things have happened in the past, and more will happen in the future. Imagine what wonders, disasters and strange creatures will appear on this unpredictable planet in the future.

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