readx;? About 15 billion years ago———— Big Bang

About 6.6 billion years ago———— the supernova exploded in the pre-solar system

The solar system was formed about 4.567 billion years ago ————

About 4.54 billion years ago———— planets in the solar system were formed

The moon was formed about 4.53 billion years ago ————

About 4.4 billion years ago———— primitive crust and oceans were formed

About 3.8 billion years ago———— the first permanent crust was formed

About 3.6 billion years ago———— prokaryotes (including cyanobacteria (plant ancestors) and bacteria (animal ancestors)] appeared

About 2.2 billion years ago———— global snowball event occurred

About 1.7 billion years ago———— eukaryotes appeared

About 1 billion years ago———— the original unified continent of Rodinha appeared

About 850 million years ago———— global snowball event occurred

About 600 million years ago———— multicellular organisms appeared (metazoans without hard shells)

About 550 million years ago———— small animals with shells appeared

Cambrian ———— [about 541 million years ago - 485 million years ago]

Two major platforms, East Gondwana (India, Australia, Antarctica) and West Gondwana (Africa, South America), were initially formed. Pen, fun, pavilion www. biquge。 info

Arthropods, echinoderms, mollusks, brachiopods, penoliths, paleocupes, paleomesomorphs, softtongue snails, odontosaurus, nautilus, odontocal, etc. are found in invertebrates. The nautilus became a large carnivore in the oceans at that time, dominating the oceans.

Chordates (including Chinese eels, Yunnan fish, Haikou fish, etc., Chinese eels, Canadian pikeworms, and Upper Cambrian duck scale fish in the United States) are present.

Ordovician ———— [about 485 million years ago - 443 million years ago]

The Gondwana continent was formed, and the ancient Laoya continent that remained of the ancient continent of Rhodinha became the only two continents. Maritime invasions on a global scale are beginning to emerge.

Corals and foraminifera in invertebrates, bamboo stones, echinoderms in sea lins and sea lilies, and arthropods in mesozoans and bryozoans began to appear.

Occurrence of marine primitive vertebrates (stellar turtles and folded fishes of heterocarbates).

Terrestrial vertebrates occur (freshwater jawless fishes).

About 443 million years ago———— first extinction event (ice age event) occurred

Silurian ———— [about 443 million years ago - 419 million years ago]

The land began to rise significantly from the sea, and the continent area expanded significantly.

Terrestrial plants appear (gymnophytes).

Jawed shield fishes and echinoculias appear.

Devonian ———— [about 419 million years ago - 359 million years ago]

Lycopodiums, primitive wedge-leaved plants, the most primitive true ferns, bryophytes, true ferns, seed ferns, and primitive gymnosperms appear.

The Devonian period is known as the "age of fishes".

Insects and amphibians appeared.

About 365 million years ago———— second extinction event (glacial event) occurred

Carboniferous ———— [about 359 million years ago - 299 million years ago]

The Gondwana Ancient Continent was formally formed.

Occurrence of pigtails in invertebrates.

The Carboniferous period is known as the age of amphibians (including the Carboniferous and subsequent Permians).

The most primitive forests formed by ferns (spore plants, water-loving) appeared.

Reptiles appear (Cup Dragon). It is mainly based on Panlongme.

A ———— glacial event occurred about 300 million years ago

Permian ———— [about 299 million years ago - 251 million years ago]

Ginkgo, cycads, niersans, and pines began to appear in gymnosperms.

The Permian period is known as the age of amphibians.

Reptiles of the order Ordodolet, Heterodontida, and subclass Monomorphia began to appear.

About 250 million years ago———— the third extinction event (glacial event) occurred, and the continent of Pangea began to form.

Triassic ———— [about 251 million years ago - 200 million years ago]

The Pangea continent was formally formed. Benendocycads in gymnosperms are present. Bony fishes appear.

Reptiles and mammals began to appear in the lower class of the primosaurus.

The Triassic began to enter the "age of dinosaurs", "the age of reptiles" and "the age of gymnosperms".

The subclass Tonhole became the dominant animal of the sea.

About 208 million years ago———— the fourth extinction event (glacial event) occurred

Jurassic ———— [about 200 million years ago - 146 million years ago]

Placental mammals, pterosaurs, reptiles, and birds began to appear. Allosaurus among the carnivorous dinosaurs appeared and became the overlord of the land. The plesiosaur became the overlord of the sea.

Bai Ji ———— [about 146 million years ago - 66 million years ago]

Angiosperms appeared, gradually replacing gymnosperms and becoming dominant. Primate mammals appear. Reptiles of the family Cangsauridae appeared and quickly became the overlord of the sea.

About 66 million years ago———— fifth extinction event (the Chicxulub meteorite event) occurred

Paleocene ———— [about 66 million years ago - 56 million years ago]

The continent began to disintegrate, and India, along with Australia, was separated from Antarctica and gradually drifted northward. The tip of Antarctica is gradually connected to South America. Bats and whales appear in mammals. Higher primate mammals appear.

Eocene ———— [about 56 million years ago - 34 million years ago]

In the Eocene, India and Australia united to form a superplate and washed towards the Eurasian plate, so the ancient Mediterranean disappeared and the Tibetan Plateau rose. The orders below the class Mammalia begin to appear.

Oligocene ———— [about 34 million years ago - 23 million years ago]

Birds developed further.

Miocene ———— [about 23 million years ago - 5.33 million years ago]

The Red Sea began to form, the Arabian Peninsula was separated from Africa, and the East African Rift Valley was beginning to emerge. China's east coast expanded further eastward for most of the post-Miocene, especially the Bohai and Yellow Seas, and was mostly landmass. The Tibetan plateau began to rise gradually.

The ancestors of modern mammals appeared one after another, gradually replacing the ancient and primitive mammals, and the modern mammal fauna gradually formed. The otter monkey appears.

About 7 million years ago———— Chadian Shah apes appeared

About 6.1 million years ago———— Tugenyuan appeared, who were able to walk on two legs

About 5.8 million years ago———— Archaeopteryx appeared and chimpanzees diverged from Archaeopteryx

About 3.5 million years ago———— Kenyan flat-faced man diverged from Archaeopteryx

About 3.2 million years ago———— the Three-Eyed Clan appeared

About 3 million years ago———— the Three-Eyed people began to migrate to Antarctica and the ancient continents of India

About 2.59 million years ago———— modern mountain systems such as the Alps, Himalayas, Rocky Mountains and Andes were formed, the Himalayas were uplifted into mountains, the Indian subcontinent was formed, the ancient Indian continent was submerged into the Indian Ocean, the three-eyed continent was divided, South America, Africa, and Atlantis appeared, and the Quaternary ice age began. Australopithecus appeared. The first type of human Homo sapiens appeared, and Homo sapiens were the pioneers of the Paleolithic Age;