How do fossils on Earth record the history of life on Earth?

Fossils are formed under the high pressure of the earth's crust, and fossils are the remains or remains of paleontology in the bedrock, which can tell us about the earth's paleoclimate and paleogeographic information.

When an animal dies, the animal's bones remain on the land, and the land slowly sticks to the animal's bones to form fossils.

Scientists may have found evidence of the oldest life on Earth. According to new evidence, life on Earth may have started as early as 300 million years after the Earth first formed. The oldest life on Earth was previously confirmed to be around 3.5-3.7 billion years old.

Many scientists believe that the Earth was formed around 4.5 billion years ago. This brings the age of these new microfossils to a staggering 4.2 billion years.

The discovery that the oldest life on Earth could have formed so early is exciting for many reasons. First, it shows that life began to emerge even at a time when the Earth was not yet as habitable as it is now. Second, scientists believe that these types of microfossils may also exist as signs of extraterrestrial life.

The microfossils in question were first described in a 2017 study led by researcher Dominic Papineau. However, at the time, many people were skeptical of these structures of biology**. This has led to more research on microfossils, giving birth to a new study published this month in Science Advances.

In the study, the team described potentially the oldest life on Earth as a tree-like structure, about a centimeter wide, similar to some of the bacteria we see in our day and age. In addition, scientists believe that the characteristics of these microfossils make an abiotic origin very unlikely.

Of course, the discovery of evidence of the oldest life on Earth also opens new doors to the question. If the origin of life takes such a short time to develop, then it brings more about the whole"The probability of life"philosophical questions. While the discovery of the oldest life on Earth is exciting, there is still no 100% evidence that these microfossils are the origin of living things.

The microfossils may harbor signs of ancient life, researchers say. However, it needs to be shown that these microstructures are actually inside the environment and that they are not formed in later processes. If researchers can prove this, then we will have a new solidified record of the oldest life on Earth.

Probably the Paleozoic, Mesozoic, and Cenozoic!

This 3.8 billion years ago is not really scientifically verified, and we know that the earliest organisms can only be traced back to 3.7 billion years ago. At that time, it was just a single-celled organism.

Organisms in the real macroscopic sense did not appear until the Cambrian period 100 million years ago, so people call the history of the evolution of life on earth from this time to the present as "Phanerozoic".

So far, we have been deepening our understanding of the universe and the earth itself, and the opportunity for this understanding is precisely because of the development of a social situation of our human beings. The development of society itself, to a certain extent, will require us to have more explorations for support. Recently, it has been discovered that 3.8 billion-year-old wheel hub fossils have been discovered, so what is the situation about the earth's life on earth?

The answer to this mainly involves the following points. <>

1. A brief discussion of the development of a creature on our planet. First of all, the first point is a brief discussion about the development of a creature on our earth, and it is true that most of the organisms on our earth have evolved into multinucleated cells through the continuous proliferation of monocytes. The multinucleated cell has become our whole organism today, so the changes and extensions of our entire biosphere are very rapid and full of incredible.

At the same time, all the creatures on our earth have evolved step by step to become what they are today, and any living thing that has become what it is today has gone through the evolution of thousands of species and the inheritance of selected genes. At the same time, it has also adapted to the changes in the environment and climate on our planet, such as the snow leopard that lives in the western plateau of China, these animals have a long tail and large paws, but the cheetah that lives in the African savannah has very small paws and very slender bodies. <>

2. A discovery of our fossilized human bones. There is also a discovery of our human bone fossils, which can know that we humans, that is, our ancestors, the apes, will live about a much earlier time than before. <>

3. The evolution of life on earth is through continuous adaptation and change of the natural environment. Finally, the eyes of our earth's biological history are constantly evolving through nature and their own things about nature, so as to become what they are today.

The Chronicle of the Evolution of the Earth: The Birth to the Extinction of Primitive Life.

Fossils are witnesses of history, and they help us understand how the history of the Earth unfolded.

For example, fossils of a marine creature, the trilobite, have been found in many places. It tells us how vast the Earth's oceans were during the Cambrian period, about 600 million to 500 million years ago. Many fossils of tall trees tell us that there was a time when the Earth's climate was warm and humid, which was characteristic of an era called the "Carboniferous".

There are also some "elephants" and "rhinoceros" that have long hairs, which must indicate that the weather is cold, indicating the advent of the "Quaternary" ice age.

Certain activities in nature that disappear in the blink of an eye also leave traces on the stones. The remains of the rain hitting the beach, the ripple marks of the mud and sand at the bottom of the water caused by the water waves, the footprints of ancient animals and the image of the soil cracking during the drought ......

Look at! What a record nature has kept for us. In fact, there is much more to the planet than this article introduces, and this is just the tip of the curtain.

Of course, it is more difficult to read these records than to recognize oracle bones, bell inscriptions, or cuneiform scripts. But, no matter how difficult it is, there is always a way to read it. And after reading it, it not only increases our knowledge, but also helps us to find the treasures underground.

For example, the ancient land masses formed before the Cambrian period contain many iron ores; The "Carboniferous" period also created many coal mines. If we are familiar with the history of these stones, it is possible to step in the footsteps of history and step by step towards the treasure trove underground.

Stratigraphy is a general term for the layered rocks formed during the historical development of the earth, mainly layered sedimentary rocks, magmatic rocks, and metamorphic rocks. Under normal circumstances, the strata are formed in order, the strata deposited first are below, the strata that are deposited later are above, and in the age of formation, the strata are older the lower they are, and the younger the strata are the higher they are. If the strata formed by each geological era have not undergone drastic changes in the geological structure, the normal strata of the strata still retain the state of stratigraphic order, and the strata of each geological era are like the "pages" of history, recording the history of the earth's development in the order of the old and the new under the rock strata.

The strata in nature are more intricate due to the influence of tectonic movements. Some strata are inclined or even reversed; Some strata are missing, and in this case to determine the age and order of the strata, in addition to using the decay law of radioactive elements in the crustal rocks to determine the age of the rock strata, people often use the fossils contained in the strata to determine. In general, sedimentary rocks are characterized by bedding and often fossils.

Most of the fossils in the strata are the remains of paleontology in the hard parts such as bones, shells, scales, stems, and leaves, and a few are the remains of paleontological footprints, lying marks, wormholes, feces, etc., which are filled and alternated by minerals to form calcified, carbonized, silicified, and mineralized biological remains or imprints that only maintain the original shape, structure, and impressions, which are called fossils.

There are also a few fossils with intact remains, such as mammoths in permafrost, insects in amber, etc. Organisms are constantly evolving from low to high, from simple to complex. Strata of different ages generally contain different fossils, and strata of the same age often preserve the same or similar fossils.

Therefore, for strata that are reversed or disordered, the order and age of the strata can be determined according to the fossils of organisms preserved in the rock strata. For example, if it contains the fossils of trilobites and large-feathered sheep teeth from the Paleozoic Era, it is a Paleozoic strata; Those containing dinosaur fossils from the Mesozoic Era are Mesozoic strata, etc. Fossils are like words written in the strata, and the strata and fossils are like "pages", recording the history of the earth's development.

Trilobite fossils.