Today, our planet has come a long way for 4.6 billion years. In these 4.6 billion years, how has life on Earth undergone development and changes? And what role do we humans play in this? What challenges will the planet face today? Below, please follow the editor to review the course of life on earth!
Suppose we reduce the age of 4.6 billion years to 46 years of age on Earth, let's see what has happened in those 46 years.
1, 0 to 5 years old: The Earth was hit by a companion planet, and the temperature of the impact point was as high as 16,000 degrees Celsius. Metals such as iron and nickel dissolve and sink into the center, and some of the material evaporates to form the earth's primordial atmosphere. Most of it is water vapor, the rest is carbon monoxide and nitrogen. When the Earth's temperature gradually decreased, the water vapor in the primordial atmosphere condensed into water and landed on the earth's surface, forming primordial oceans and rivers.
2, 5 to 7 years old: Proteins and nucleic acids gradually form in the primordial ocean, and a self-replication mechanism is formed. Proteins and nucleic acids combine and symbiosis to form primitive life.
3, 7 to 27 years old: primitive life developed in the ocean, and plate movement on land formed a huge supercontinent.
4. 27 to 40 years old: Life forms are gradually evolving, and supercontinents are also clustered and separated.
5, 40 to 40.5 years old: The Ediacaran biota, which is considered an animal, appeared in the ocean, but for some reason it became extinct.
6. 40.5 to 42 years old: Multicellular organisms exploded, giving birth to the Badgers shale fauna, but became extinct before the age of 41. The earliest vertebrate primitive fish was born before the age of 41.2. Because plants in the ocean continue to release oxygen, ozone is generated by the action of the sun's ultraviolet rays, and an ozone layer is formed in the atmosphere, making the continent a new world for life to survive and develop (but humans are now destroying ozone). So marine plants successfully landed on the earth when they were more than 41 years old and became the rulers of the earth.
7, 42 to 43 years old: Insects landed after plants, and some fish and amphibians vertebrates also changed from gill breathing to lung breathing, developing to the mainland to form reptiles.
8. 43 to 44 years old: Mammalian reptiles appear, while most marine invertebrates die from volcanic activity. At the age of 43.82, dinosaurs appeared.
9, 44 to 45 years old: The era of dinosaur domination of the earth has arrived, and herbivorous dinosaurs more than 20 meters long and carnivorous dinosaurs of 12 meters have appeared on land. There are long-necked dragons and ichthyosaurs in the ocean, and pterodactyls in the air. It can really be described as the development of the sea, land and air trisolaran!
10, 45 to 45.5 years old: The Earth was hit by an asteroid or comet, causing a huge change in the environment, most of the species of dinosaurs went extinct, cave life and nocturnal mammals were spared!
11, 45.5 to the present: Before the age of 45.52, in what was then North America, a false bear monkey evolved into the earliest ape, shaped like a pig!
12, 45.95 years ago, that is, about 18 days from now, the Ramida ape in North Africa developed separately from the chimpanzee, and then walked upright, becoming a huge difference from other great apes.
More than 13 or 9 days ago, African clever people began to make "secondary tools" to tear open rotten flesh and remove bone marrow, becoming Homo erectus.
14 or 6 days ago, Homo erectus began to use fire to defend against predators, while also being used as night lighting, heating, and cooking food.
15 or 4 days ago, Homo erectus began to migrate from Africa to the continents of Europe, Asia and the Americas.
16, 4-1 hour ago, Homo sapiens began to hunt with javelins and bows and arrows, and painted murals and clay to knead bison and other animal statues.
17, 42 minutes ago, humans began to sow seeds, so they began to settle.
18, 22 minutes ago, humans began to smelt copper, and then began to smelt iron. This was followed by commercial activities such as material exchange, which led to the emergence of cities and became commercial, political, religious, and military centers.
19 or 12 minutes ago, Chinese began to build the Great Wall.
20 or 7 minutes ago, Chinese excavated the Beijing-Hangzhou Grand Canal.
21, 2 and a half minutes ago, the Portuguese took a boat around the earth.
22 Half a minute ago, mankind developed aviation, flying into the blue sky by balloons, airships and airplanes.
23 In the last 2 minutes, although human science and technology have developed rapidly, the population has also doubled several times, and in less than 1 second, the total population of the earth has exceeded 6 billion.
It can be seen that the emergence of human civilization is only an hour for the earth that has experienced hundreds of millions of years, but the harm of human beings to the earth is extremely deep and great! In particular, the environmental pollution caused by industrial civilization is challenging the limits of the earth's endurance minute by minute, and it has also caused the earth's biological population to suffer a great disaster! Due to the double harm of environmental pollution and human hunting, the hard-won biological population on the earth is dying out little by little!
List of human-induced animal extinctions (partial)
The great sea cow became extinct in 1768;
The dodo became extinct in 1681;
The moa became extinct around 1800;
The great auk became extinct in 1844;
Cape (Cape of Good Hope) lion became extinct in 1865 (the southernmost and largest lion subspecies living);
Atlas brown bear became extinct in 1870 (the only brown bear and bear native to Africa);
The Antarctic wolf became extinct in 1875 (the canine family that lives in the southernmost part of the planet);
The American Maine sea ferret became extinct in 1880;
Jamaican hamsters became extinct in 1880 (regional extinction);
The Chinese white-rumped langur became extinct in 1882 (regional extinction);
The spotted donkey became extinct in 1883;
The Australian rabbit was extinct in 1890;
The Queensland hairy-nosed wombat became regionally extinct in 1900;
The Christmas Island tiger rat became extinct in 1900;
The O.M. bullet rat became extinct in 1901;
The white-footed Australian forest rat became extinct in 1902;
The Southern California cat fox became extinct in 1903;
The striped rabbit kangaroo (mainland Australia) became extinct in 1906 (regional extinction);
The possum became extinct in 1910;
The Eastern Possum became extinct in 1940;
The North American White Wolf (Newfoundland White Wolf) became extinct in 1911 (the only gray wolf with a pure white body);
The Carolina parrot bird became extinct in 1914
The passenger pigeon (North American passenger pigeon) became extinct in 1914 (billions became extinct in less than a century);
The Kenai mountain wolf became extinct in 1915 (the largest wolf subspecies);
The Florida Black Wolf became extinct in 1917;
The New Mexico wolf became extinct in 1920;
The Barbary lion became extinct in 1922;
Chinese rhinoceros became extinct in 1957 (regional extinction);
The Australian porpoise possum became extinct in 1926;
The Australian flower kangaroo became extinct in 1927;
The Giant Rabbit Possum became extinct in 1930;
The New South Wales white kangaroo became extinct in 1930;
The Balinese tiger became extinct in 1937 (the smallest tiger subspecies);
The Pakistani sand cat became extinct in 1940;
The Indian Asian cheetah became extinct in 1948 (regional extinction);
The Cascade brown wolf became extinct in 1950;
The Mexican Grizzly Bear became extinct in 1964;
The Texas Red Wolf became extinct in 1970;
The Taiwan clouded leopard became extinct in 1983;
Caspian tiger (West Asian tiger) became extinct in 1980;
The Javanese tiger became extinct in 1980;
The Guatemalan partridge became extinct in 1987;
The Canadian black-footed ferret became extinct in the 1990s (regional extinction);
The Eurasian mink became extinct around 1997.
According to the world's authoritative statistics, 110 species and subspecies of mammals and 139 species and subspecies of birds disappeared from the earth in the 20th century. At present, there are 593 species of birds, more than 400 species of mammals, 209 species of amphibians and more than 20,000 species of higher plants in the world that are endangered!
Compared with the accident of life and the great difficulty of species evolution, the destruction of earthly creatures by human beings is simply an easy and violent thing! Don't wait until there are only humans left on the earth to regret it, it's like the monotony of only stones! There is no destruction without greed, and no harm without buying and selling. For the sake of our great homeland, humanity, please protect our remaining companions!