The Sixth Mass Extinction

The five major extinction events in Earth's history were as follows: 1. The first mass extinction occurred in the Ordovian period (about 440 million years ago). At that time, life on Earth was dominated by marine life. During this period, marine species were extremely prosperous. In this extinction event, 85% of species were extinct, mainly because of global cooling. The arrival of the Great Ice Age caused a drastic change in temperature and a large area of seawater was frozen. 2. The second mass extinction occurred from the late Devonian to the early carbonatite period (about 365 million years ago), during which fish were the most abundant creatures. The extinction led to the extinction of nearly 65% of the creatures, with the extinction rate of marine creatures being much higher than that of terrestrial creatures. The reason for the extinction was that the "super mantle plume" magma broke away from the earth's core, triggering a massive volcanic eruption. A large amount of high-temperature gas melted into the seawater, causing the seawater to boil and decompose. The toxic gas ejected from the magma also caused drastic changes in the environment such as acid rain. 3. The third was at the end of the Permian period 250 million years ago. This was the most serious of the five mass extinction, with more than 96% of marine life and 70% of land life extinct. The main reason was geological activity. The super volcanic eruption lasted for more than 8 million years, and the surface of the earth became a purgatory. 4. The fourth mass extinction occurred at the end of the Triassan Period (about 200 million years ago), and more than 76% of species were extinct. The main character of this mass extinction was the volcanic eruption. After the volcanic eruption, lava was everywhere, volcanic ash covered the sky, plants could not photosynthesize, the producers of the food chain disappeared, and all kinds of creatures lost their food sources, leading to the extinction of creatures. 5. The fifth mass extinction occurred at the end of the cretaceous period 65 million years ago, also known as the dinosaur extinction. The protagonist of this extinction event was a volcanic eruption, and the cause of the volcanic eruption was an asteroid hitting the Earth. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The first mass extinction event (Ordovician-Silurian extinction event) caused 27% of the world's families and 57% of the species to go extinct, and nearly 85% of the species went extinct. Large amounts of land gathered near the poles, icebergs piled up, sea levels fell, and the originally rich coastal biosphere was destroyed. Earth only regained its vitality after hundreds of thousands of years. After that, the earth recovered, and all kinds of creatures evolved again. The marine animals developed by leaps and bounds. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The second mass extinction occurred in the late Devonian period 360 million years ago. During this period, the dominant species on Earth were fish. This mass extinction was quite terrifying, mainly reflected in the following aspects: Judging from the proportion of species extinction, it caused about 65% to 78% of species to become permanently extinct. The marine life was severely damaged, including the extinction of the quadruped and scutellaria, and the destruction of the forest ecosystem. At that time, the biological environment was greatly impacted. One of the most prominent features of the Devonian biological world was the development of aquatic vertebrae, and this extinction event dealt a heavy blow to the development of life. From the perspective of ecosystem impacts, after the end of the Ice Age, the global temperature had risen sharply, and the oxygen layer was constantly destroyed. A large amount of ultraviolet radiation poured down, destroying the forest system and the plants in the ocean. As time passed, the entire ecosystem was affected, and the biological variety was greatly reduced. However, some creatures, such as bony fish, survived the extinction event and replaced the placoderms. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The reasons for the five mass extinction on Earth were as follows: 1. ** Ordovian mass extinction (about 440 million years ago, ranked second among the five mass extinction events)**: The main reason is that the global climate has cooled, the Earth has entered the Ice Age, and the sea level has dropped significantly. At that time, there was a more mainstream hypothesis that a star 60 million light-years away from Earth exploded into a supernova. The gamma-ray burst produced by the two poles hit the Earth, and the energy produced for 10 seconds contained the energy of 10 suns, causing the Earth's atmospheric molecules to denature. 30% of the oxygen layer was taken away, and a large amount of sunlight directly reached the Earth's surface, causing the death of shallow sea algae, which led to the death or even extinction of marine life. 2. ** Devonian mass extinction (from the late Devonian to the early Charcoal period, about 377 million years ago, the longest of the five mass extinction)**: It may be the result of multiple asteroid impacts and volcanic eruptions. During the late Devonian period, plants moved to land without natural enemies and grew in large numbers, destroying the carbon-oxygen cycle. The increase in oxygen content and the decrease in carbon dioxide content led to a drop in the Earth's temperature. Many creatures could not adapt to the cold and went extinct. In addition, many asteroid impacts caused a small number of creatures to go extinct each time, but they accumulated to cause mass extinction. 3. ** The mass extinction at the end of the Permian period (251 million years ago, the most serious of the five mass extinction)**: Probably caused by the eruption of the mantle plume. In the late Permian, all the land was compressed into the Pangu supercontinent, and then separated due to volcanic activity and earthquakes. The eruption of the super mantle plume triggered volcanic eruptions, and volcanic debris ignited the forest, raising the temperature of the earth. The subsequent climate change led to the extinction of life. 4. ** Early Triassic-Period mass extinction **: The reference materials did not explicitly mention the specific cause of this mass extinction. 5. ** End of the cretaceous period mass extinction (65 million years ago)**: The view that led to the mass extinction of life is usually believed to be the impact of large asteroids or comets on Earth, the eruption of super volcanoes on Earth, the Earth experiencing a large ice age, and other factors that may change the climate of the entire Earth. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

There have been five major mass extinction events in Earth's history: 1. The mass extinction at the end of the Ordovian period, about 445 million years ago, was the earliest of the five major extinction events and ranked second in the severity of the five major extinction events. This extinction event mainly affected marine life, causing about 85% of the world's marine species to disappear. The extinction event was closely related to global climate change. It might be the arrival of the global ice age. Gondwana was located in the Antarctic. The formation of large-scale ice sheets caused the global sea level to drop significantly, the shallow sea creatures lost their habitat, and the ocean circulation pattern changed. The event was divided into two phases. The first phase was related to global cooling, and the second phase was related to rapid warming. This violent climate fluctuation exceeded the adaptability of most marine organisms. 2. The late Devonian extinction, about 375 million years ago, caused about 75% of the world's species to disappear. The event occurred shortly after the first large-scale landing of organisms and had a profound impact on both marine and terrestrial eco-systems. Its most prominent feature was the collapse of reef-building organisms. The Devonian coral reef ecosystem was destroyed, and there were almost no large reefs formed for millions of years, which had a catastrophic impact on the marine ecosystem. There was also evidence from the Earth's chemistry that it was closely related to the global oceanic anoxia event. Black shales rich in organic matter in Devonian formations around the world indicated the oceanic anoxia environment, which led to the large-scale death of marine life and changed the global carbon cycle. In terms of the terrestrial ecosystem, it was consistent with the major changes in the early forest ecosystem. At the end of the Devonian period, many primitive vegetative plants disappeared and were replaced by gymnosperm, changing the appearance of terrestrial vegetation, atmospheric composition, and climate. 3. The end-Permian extinction, about 252 million years ago, was the most serious of the five mass extinction, causing 98% of marine life and 96% of land life to suddenly disappear within 500,000 years. 4. The fourth mass extinction occurred in the early Triassan period. 5. The fifth mass extinction occurred at the end of the cretaceous period, 65 million years ago. The most famous one was the permanent disappearance of dinosaurs. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The first five extinction periods on Earth were: 1. The first mass extinction occurred 440 million years ago at the end of the Ordovian period. 2. The second mass extinction occurred from the late Devonian to the early carbonatite period, about 377 million years ago. 3. The third time was at the end of the Permian period 251 million years ago. 4. The fourth mass extinction occurred in the early Triassan period. 5. The fifth mass extinction occurred at the end of the cretaceous period 65 million years ago. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The most serious of the five mass extinction events in Earth's history was the mass extinction at the end of the Permian period 251 million years ago, causing 98% of marine life and 96% of land life to suddenly disappear within 500,000 years. The second most serious of the five mass extinction events was the mass extinction at the end of the Ordovian period 440 million years ago, causing about 85% of species to go extinct. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The prehistoric mass extinction and the current decline in biological species are two different phenomena with many differences. The prehistoric mass extinction referred to a large-scale extinction event that had occurred in Earth's history, resulting in the extinction of many species and causing serious impacts on the ecosystem. Such extinction events could be caused by natural disasters, climate change, human activities, etc., such as the Great Ice Age and the extinction of dinosaurs. Unlike the current decline in biological richness, the prehistoric mass extinction event was a global event that had a long-term impact on the Earth's ecosystem and may have left behind many relics and fossils. The current reduction in biological species referred to the reduction in the number of biological species on Earth or the extinction of certain species. This decrease could be due to climate change, human activities, natural disasters, and other reasons. Unlike prehistoric mass extinction, the current loss of biological species is usually local and may be caused by human activities or natural disasters rather than global events. The extinction of prehistoric creatures and the current reduction of biological species are both important events in Earth's history. They have a profound impact on the Earth's ecosystem and human life.

In the 2019 WCG World Finals, AG was left with only one player when the total score was 8 - 8, while GV was left with three players and adopted a safe strategy. The situation at that time was extremely unfavorable for Void End. Void End wasn't good at endgames, and GV had the advantage in terms of numbers and tactical choices. The scales of victory tilted towards GV. However, after Void End's entry point was discovered, the two players from GV's entry point came out with the people from the fork lift to prepare a three-person simultaneous follow-up shot. Coincidentally, the three of them stood in a line. Void End did not even pull his gun, and three consecutive headshots instantly killed three people. Void End was able to complete this 1v3 feat because his reaction was very fast. The moment he saw the three GVs appear and stand in a line, he could accurately and quickly shoot, thus achieving a triple kill. This wonderful operation made the audience and commentators excited, and it became a classic scene in the CHF. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

There were many scenarios for the story of extinction. In a futuristic world, humans have mastered superb technology and great power, but they have ignored the essence of human beings. Due to human greed and selfishness, they continued to expand their territory and resources, even at the expense of destroying the environment and other life. In the end, mankind fell into a global war. They attacked each other and destroyed the entire earth, leaving it in ruins. In the war, countless cities and villages were destroyed, and human lives suffered a great loss. However, even though the human race had perished, their story continued. At some point after the extinction of mankind, some survivors will reappear in every corner of the earth. They will continue to tell the story of mankind and explore this new world in search of new hope and future.