What was the Earth like 6 billion years ago

Hehe! The life span of the earth has been analyzed by the scientific community authoritatively, and the result is that it is only 100 million years, so 100 million should not exist, but there are other factors affecting him, the external factor is the sun first, because it is the closest to the earth, and the planet that can fate on the right earth That is to say, all the energy and power on the earth come from the sun, and once the sun has three long and two short, it will inevitably affect the earth. Before the 30s of this century, people always thought that the sun would one day burn out, turn from white to orange and then to red, and finally become a dark star that was silent, but its brilliant life.

In the 30s, when physicists learned the mystery of the sun's light, the situation was very different. It turns out that the Sun's energy comes from its thermonuclear reactions, and the Sun's lifetime will pass through the gravitational contraction phase, the main-sequence star phase, the red giant phase, and the compact star phase. The main sequence phase is the period of stability of the Sun.

This phase will last for 10 billion years. At present, the sun is only halfway through and is in middle age. Once the Sun reaches the red giant stage, then the end of the Earth is coming.

Of course, this is billions of years away. Are there any other factors besides the sun's interference with the earth? Some scientists believe that the Sun may have a brother, a companion star of the Sun, which orbits the Sun day and night, and every 26 million years, turns to the closest place to the Sun"Make waves"Its strong gravitational pull will cause a large disturbance of many comets, and 1 billion comets will be on a rampage in the solar system, and the Earth and other planets will become these comets"Target"。

If the mass of the comet that collides with the Earth is large enough, the consequences are unimaginable: the extinction of light organisms and the upheaval of ecology; Heavy landslides and earth cracks, the earth"Broken bones"。However, this solar companion star, which could bring misfortune to Earth, has not been discovered, although many scientists believe it exists.

At that time, the earth was not yet visible, and now the life span of the earth is 4.5 billion.

At that time, the earth was not formed, just some cosmic dust.

At that time, the Earth was supposed to be part of another planet.

Six billion years ago, the Earth had not yet begun to form.

At that time, the earth had not yet been born!

The Earth was formed 4.6 billion years ago. The universe was born 15 billion years ago, laying the material foundation for the creation of the earth. As a planet, the Earth originated from the primordial solar nebula 4.6 billion years ago, and like other planets, it has undergone some common physical evolution processes such as accretion and collision.

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The material that formed the primitive Earth was mainly the primordial material of the nebula disk, the composition of which was mainly hydrogen and helium, which accounted for about 98% of the total mass. In addition, there is solid dust and material thrown out during the early shrinkage evolution phase of the sun.

In the process of the formation of the earth, due to the differentiation of matter, light matter is constantly separated with volatile substances such as hydrogen and helium, and is carried to the outside of the solar system by the sun's light pressure and the material thrown by the sun.

4 billion years ago was the Archaic Age, and the Earth at this stage may have had a large number of basins on its surface, and the oldest known rocks on Earth were formed during this era.

Four billion years ago, the earth had only land and seawater, and there was no living life, and it was only in the process of continuous evolution that life appeared.

It's very primitive, almost nothing, desolate, creatures are very scarce, there is no food**, and it can't survive at all.

Here's what the Earth looked like hundreds of millions of years ago:

The age of the earth:

The time when the Earth accumulated from the primordial solar nebula to form a planet to the present. The current best estimate of the Earth's age is 100 million years, and what is commonly referred to as the Earth's age is its astronomical age. The astronomical age of the Earth refers to the time when the Earth began to form to the present, which is closely related to the hypothesis of the origin of the Earth.

The geological age of the Earth refers to the time from the beginning of geological processes on the Earth to the present. It is estimated that hundreds of millions of years have passed from the formation of the primitive Earth through the early slip to the hierarchical structure of the Earth, so the geological age of the Earth is less than its astronomical age.

What was the earth like 100 million years ago: <>

The Earth we live on was born 100 million years ago. In the long years since the birth of the earth, the earth's climate has been alternating between cold and warm, and the species living on the earth have also experienced five mass extinctions.

100 million years ago, there was a lot of life on Earth, with a variety of flora, fauna, and water.

Dinosaurs were reptiles that appeared 245 million years ago and flourished at the end of the Mesozoic Era 65 million years ago.

Now we know that the dinosaurs went extinct 65 million years ago, and at that time, not only were all the dinosaurs that had ruled the earth for more than 100 million years extinct, but the same tragic fate befell many other creatures living on the earth's land, sea and sky.

100 million years ago were: Cretaceous, Jurassic, Triassic eras.

1. Cretaceous.

The Cretaceous Period is the last epoch of the Mesozoic Era in geological time, beginning 100 million years ago and ending 66 million years ago, over a period of 79 million years. It is the longest phase of the Phanerozoic.

During the Cretaceous period, the continents were divided by oceans, and the earth became warm and arid. During the period of the largest dinosaurs, many new species of dinosaurs began to appear, dinosaurs still ruled the land, pterosaurs glided through the sky, and huge marine reptiles ruled the shallow seas.

2. Jurassic.

The Jurassic is a geological epoch between the Triassic and Cretaceous periods, ranging from 199.6 million BC (600,000 years of error) to 145.5 million years (4 million years of error).

3. Triassic.

The Triassic (English: Triassic), a geological epoch between 100 million BC and 200 million BC, is located between the Permian and Jurassic periods, and is the first epoch of the Mesozoic Era. The beginning and end of the Triassic were each marked by an extinction event.

The Earth 100 million years ago

100 million years ago was the period of chalkiness of the earth, most of the earth's surface is ocean, and the land is relatively scarce, due to the great change in sea level, only dinosaurs live on land, and volcanoes can be seen everywhere, so the environment at that time was very harsh, human beings were in that era is impossible to survive.

And at that time, not only were all the dinosaurs that had ruled the earth for more than 100 million years extinct, but the same tragic fate befell many other creatures living on the earth's land, sea, and sky.

Marine reptiles such as plesiosaurs were also wiped out in this disaster, when about 50 per cent of the planet's genera and almost 75 per cent of its species disappeared forever from the planet.

At that time, there were no humans, and dinosaurs were rampant and dominated the world.

Approximately a sphere, it looked little different from it does in space.

Desolate world.

There are no artificial traces on the ground.

Humus-free soil.

Estimate the foul-smelling sulphur taste.

The color of the water is cloudy.

The color of the sky is pale gray.

It was very windy and foggy.

There is no glimmer of hope in sight.