Live: Opening decryption Oxygen is highly toxic

Kilimanjaro.

Sun Zhiqing couldn't help swallowing when he heard this passage.

He was the first person to watch Qin Mu's popular science live broadcast.

Every time Qin Mu broadcasts live, he can break out some viewpoints that shock the world.

He thought he was used to it.

But now...

The source of the frozen earth that lasted for 3 million years was also found by Qin Mu!

think carefully.

There is nothing wrong with what Qin Mu said.

Only in this way can the earth's activities be artificially interrupted, resulting in an anomaly of 3 million years!

Other than that, no theory can explain this phenomenon!

Because the internal activities of any planet are going on every moment.

There may be a period of silence.

But it is absolutely impossible to last for a full 3 million years!

It's almost impossible to do this without human intervention!

at this point……

It is also confirmed from the side again that alien civilization really exists!

In the long prehistoric era, it once existed!

on the phone screen.

Qin Mu's voice came out again: "This ice age, which lasted for 3 million years, directly turned the earth into a snowball."

The voice fell.

The ancient earth he manifested, snowflakes are flying, and it is getting bigger and bigger.

As the time parameter elapses.

The temperature of the earth's surface began to gradually decrease.

After 3 million years...

The earth has always been in the process of being covered with ice and snow.

This period is also known as the "Snowball Earth" period.

"At the same time, in the past 3 million years, the composition of the earth's atmosphere, following the sharp decline of methane, has also ushered in a drastic change in the content of carbon dioxide!"

Carbon dioxide is one of the culprits leading to the greenhouse effect.

The earth's high temperature of 800°C is responsible for a lot of credit.

The cause is because of the comet rain that lasted for 2 million years.

Gases such as carbon dioxide in the earth's crust escaped, forming a high temperature covering the whole world.

And this time the process of "cooling down" the earth.

The content of these gases such as carbon dioxide is rapidly reduced.

back into the crust.

"Since then, the content of gases such as methane and carbon dioxide in the atmosphere has been continuously reduced..."

"And 3 million years later, that is, 21 billion years before history, the earth began to unblock!"

Following Qin Mu's voice fell.

In the picture that appears, the earth is really starting to unblock.

Various volcanic eruptions, crustal activities, and bizarre recovery!

The temperature began to rise slowly.

During this period...

Oxygen ions are fully nurtured and constantly growing.

"After spending 3 million years transforming the laboratory, immediately after that, there appeared... the Great Oxidation Event that could affect the course of Earth's history!"

Qin Mu took a deep breath.

On the blackboard behind him, he wrote down the extremely far-reaching events during this period!

And heard here.

Countless people raised their heads involuntarily.

His expression became extremely serious.

The Great Oxidation Event...

It is very likely that it has affected them now.

It makes their entire earth now become a world of oxygen.

Living things without oxygen will die.

And from Qin Mu's "science popularization".

They've all realized that...

Even until 24 billion years ago, all living things on the entire earth did not need to rely on oxygen to survive independently!

During this stage, many intelligent life forms and the civilizations they created may have been born.

but……

But because of the extraterrestrial intervention, they were all buried in the long river of history.

"The first step in the Great Oxidation Event is atmospheric oxidation."

on the podium.

Qin Mu looked at the experts and professors in various fields in the audience, and began an in-depth analysis.

Atmospheric oxidation.

As the name suggests, the structure of the atmosphere has undergone earth-shaking changes.

"After the Hadean Eon, oxygen ions increased in large quantities first, and gases that inhibited the growth of oxygen ions, such as methane gas and carbon dioxide, gradually decreased, so the atmosphere was very suitable for the survival of oxygen ions."

At this stage...

Alien civilization has removed all obstacles for the growth and cultivation of oxygen ions.

This makes the growth rate of oxygen ions even more frightening.

"Finally, on the earth, the first type of life related to oxygen ions was born from the hot springs on the seabed."

"They carry the genes of oxygen ions, and under the deliberate leadership of the alien civilization, they began to reproduce in large numbers, and soon, they spread all over the ocean!"

The voice just fell.

In the materialized screen behind him, a creature suddenly appeared in the entire ocean.

Crazy growth.

"It is cyanobacteria. Of course, it also has a familiar name..."

Qin Mu faced the camera.

Smiled slightly: "Blue algae!"

Its appearance and occupation of the entire ocean is also a very bizarre scene in the history of the evolution of the earth.

According to the observation of modern science.

With its life structure and genetic characteristics, there are many nemesis.

For example, methane bacteria.

and carbon dioxide.

Writing is its killer!

0.4 However...

The timing and conditions for its appearance are unique.

First, the large reduction of nickel makes the methane bacteria almost disappear.

After the ice age, carbon dioxide also disappeared in large quantities.

as if……

It carries the luck of heaven and earth, and it is born with unique blessings.

And as soon as it appeared, it occupied the entire ocean at a terrifying speed!

"Its appearance has made alien civilizations attach great importance to it, because they discovered... this kind of cyanobacteria can release a higher-level gas, oxygen!"

on the podium.

Qin Mu continued popularizing science.

With the appearance of the word oxygen, everyone in the entire institute pricked up their ears.

Finally talked about the key to their current research!

"This high-level gas was actually regarded as a waste gas at the beginning."

"They are produced by cyanobacteria and emitted into the air, but all living things on the earth at that time did not need this gas and refused to absorb it!"

Qin Mu's words lifted the veil of this ancient period again.

at first.

The appearance of oxygen is not highly toxic.

It's like exhaust.

All living things can absorb it and excrete it.

It didn't have any effect.

Just like carbon dioxide today.

People breathe carbon dioxide every day and again emit this exhaust.

Oxygen's status at that time was similar to that of carbon dioxide and other gases.

creature at the time.

There is no dependence on oxygen!

They can survive without oxygen.

"And during this period, due to the massive growth of blue-green algae, the color of the entire earth turned green from outer space!"

"It's also Earth's second phase, Green Earth!".

Chapter 140 Another ice age, the sun is darkened!

the previous stage.

Because of the emergence of a large number of anaerobic life, the earth's oceans formed purple.

It is called the purple earth period.

And this time...

With the growth of cyanobacteria, green covers the entire sea.

Make it look from outer space.

The whole earth has turned green.

As for why cyanobacteria took over the ocean, but turned green...