9621 Agnes Crossing, Lake Suzanneview, New Mexico Island 84604-9295.
From global disasters to revolutionary evolutionary milestones Our planet, which has survived many significant events, has become our home on which we breathe today as a result of
From global disasters to revolutionary evolutionary milestones Our planet, which has survived many significant events, has become our home on which we breathe today as a result of all these.
Come to these important events step-by-step let’s see:
On the way to the formation of our planet, known to be made up of dust and rock fragments around the sun, first after the rocks collided With the effect of gravity, they begin to pull other rocks around them, then together they form the Earth.
after this event A large celestial body collides with the Earth and as a result, huge amounts of debris are scattered in space. Similar to the formation of the Earth, these remnants similarly attract each other and combine to form the Moon.
The question of when exactly life began on our planet has not yet been answered one hundred percent; but judging by the oldest fossils we have of single-celled organisms, there is life about 4 billion years old.
first of life on the ocean floors It is thought to have started in volcanic hot springs.
The sun is our planet’s largest source of energy. If life were to evolve, it would be created by this vast energy source, and it did. Some microorganisms have succeeded in using sunlight to convert simple molecules into sugar molecules. But these early photosyntheses were different from today’s; As a result, the atmosphere was not released for the oxygen. So there was no oxygen in the atmosphere.
Plate movements account for the largest share in the formation of today’s landforms and continents. These movements first started happening 3 billion years ago.
For a long time, there was no free oxygen in the Earth’s atmosphere. On time cyanobacteria, After photosynthesis, it began to release oxygen into the atmosphere. The accumulation of oxygen in the atmosphere allowed the air to be enriched with oxygen.
At the time, this wasn’t actually very useful; Because no living creature was accustomed to oxygen. Therefore, most of the living things that emerged could not get used to this intense oxygen and perished; some species managed to survive.
One of the reasons for this is that some people can’t get to oxygen for years. in deep ocean regions Another is that they evolved by chance to be unaffected by oxygen.
Some of the first cells, similar to today’s bacteria, began to evolve over time. According to this situation, studied by endosymbiosis theory, mitochondria and chloroplast organelles were originally bacteria; but when they enter into a mutually beneficial relationship with the cells, they are ingested to eukaryotic cells They cleared the way.
To further say that it has nothing to do with today’s sex; The beginning of reproduction (sex) by cooperating with another living being rather than splitting in two and multiplying on its own. It dates back to 1.2 billion years ago. In fact, in some fossils from this period, red algae were seen to have spores, which are reproductive cells.
In this period, when life forms with more than one cell began to form, Gradually the first organs also form. Fossils with more than one cell have even been found 2 billion years ago; however, these are thought to be bacterial colonies and not any living thing.
Multicellular organisms are believed to have evolved at different times in different parts of the planet; However It is thought that plants were the first to succeed.
On our Earth, which entered the Ice Age twice during this period, ice is believed to have covered the entire planet. It is believed that the first advanced animals also began to evolve during this period.
The most important chapter in world history In the Cambrian Explosion, which can be described as the Cambrian Explosion, many animal species that are the ancestors of today’s animals came into being in very short periods of time in terms of evolution.
belonging to this period too many fossils detected; The reason for this is the fact that living things developed very hard shells during that period, and so it was easy for their fossils to be preserved and preserved.
Some animals land 500 million years ago It is believed that these animals only do this for a short time to lay their eggs in a safe place.
the mainland The first inhabitants were plants. Although the first terrestrial plants were green algae, diversity began to emerge in a short time.
Although the world was very excited about the Cambrian explosion, before 100 million years had passed since this period, the second largest mass extinction event in history occurred and the resulting mass extinction occurred. 85% of living creatures perished.
Most of the surviving species were in the oceans, so the planet was sort of advanced fish species.
After this mass extinction, a few plants still lived on land. Fish species too to lay their eggs When they came out of the water, they must have thought that terrestrial life could be good too, so they started taking more steps on land.
Actually the first animals to conquer the land were insects; however, when the fish came ashore and evolved into the first species, the ancestors of amphibians, reptiles and mammals, dominance was lost to insects.
When the world was in the middle of the Paleozoic Ice Age, the first reptiles began to appear. Reptiles evolved from amphibians, Thanks to their hard shells, they quickly began to cement their dominance on land, thanks to their eggs that they did not need to put in the water.
The continents on Earth came together for the last time to form the supercontinent Pangaea. pantalassa Surrounded by an ocean called Pangaea, after 125 million years to maintain its structural integrity, it began to break up and form the current continents.
This extinction, also called the Permian mass extinction, caused the largest mass extinction ever in the history of the world, It wiped out 96% of it.
The cause has not yet been determined, however believed to be caused by volcanic eruptions After this period, dinosaurs began to evolve and take control.
Braving mass extinctions, Earth watched as the dinosaurs took over, as the first mammals quietly began to form in a corner. It is believed that early mammals were primarily nocturnal, which would have played a role in the evolution of warm-bloodedness.
While dinosaurs ruled the land, huge reptiles were found in the seas, then another catastrophe (Triassic extinction) and 80% of living species removed from the ground.
After this mass extinction, the cause of which is unknown, the terrestrial dominance of the dinosaurs was cemented and they have grown to gigantic proportions.
This period, when the first birds began to evolve, is especially famous for the bird species Archeopteryx. This species, which appears to be the first bird species, seems to have lost this trait thanks to new fossils found today in China.
Although the existence of plants on land dates back to ancient times, It took a long time for the first flowers to form. The existence of flowering plants coincides with the middle of the dinosaur age. It seems that it took even longer for the grass to form.
fall within Mexico a meteor It turns the Earth upside down with the impact of a violent collision. Dense deposits of dust completely cover the atmosphere, blocking sunlight, and with the cold and darkness, the Earth ranks fifth witness its latest mass extinction. In addition to dinosaurs, many living species disappear from the scene of history during these periods.
Instead of laying their babies shortly after the dinosaurs went extinct, they’re in their tummies, as we humans do. placenta Mammals, having evolved the ability to feed and rear in a structure called it, evolve over time to form the first primates.
Then monkeys, chimpanzees and people enter the stage; but there is more to them. At that time, primates still had small skeletons of almost 30 grams. They are thought to live in warm regions and the rainy forests of Asia.
Plants, which have been engaged in photosynthesis for a long time, cannot of course stand by and watch how intense the development is on Earth. They decide to change something.
Plants starting to perform C4-type photosynthesis, which is quite different from normal photosynthesis. difficult circumstances They are even starting to adapt.
This group will extend to modern humans and modern chimpanzees after the first chimpanzees appeared in Africa 25 million years ago. It splits into two different paths.
While the exact time is still unclear, scientists have found some fossils and studies are still in progress.
It’s up to the human race. Our species, Homo Sapiens, has only been on the scene of history for such a short time, except that it has spread to all continents in such a short time, starting from Africa; He even managed to leave the world.
Although our world 6. mass extinction It is an undeniable fact that we are the most dominant and evolutionarily successful species to ever set foot on Earth, even if we drag ourselves in and cause the fastest climate change in history.
Will we burn the earth with ourselves because of our intelligence, or will we take all vitality to the next level with ourselves, Future generations will learn the answer.
Source: Web Tekno
Ashley Johnson is a science writer for “Div Bracket”. With a background in the natural sciences and a passion for exploring the mysteries of the universe, she provides in-depth coverage of the latest scientific developments.
