https://padlet.com/Ruby21127/q71nx1op2pa3 The Geologic Timeline en-us 2020-03-26 02:58:54 UTC 2023-02-19 01:55:55 UTC hello@padlet.com https://padlet-uploads.storage.googleapis.com/491258783/0e24d748cc92ff96efe9983aac86f116/u_250408132_1392327163_fm_26_gp_0.jpg Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475771514 13,800,000,000 years ago,all the substance highly concentrated,so the temperature was really high,and the big bang happened.]]> 2020-03-26 05:52:12 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475771514 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475774677 4,600,000,000 years ago,the nebular debris squeeze and collision each other,the earth formed.It just liked a big red fire ball ,and the earth only had 7 hour a day that time.]]> 2020-03-26 05:59:29 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475774677 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475779415 3,500,000,000 years ago,the first unicellular life formed on the earth.]]> 2020-03-26 06:09:15 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475779415 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475784484 13,600,000,000 years ago,the Milky Way Galaxy formed.A lot of nebular debris formed.]]> 2020-03-26 06:18:15 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475784484 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475787389 4,500,000,000 years ago,other plannets collision,and the moon formed.]]> 2020-03-26 06:23:29 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475787389 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475904229 4,280,000,000 years ago,hydrogen and oxygen compounded,water appeared.]]> 2020-03-26 08:24:15 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475904229 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475908092 2,900,000,000 years ago,the Earth became pretty cold,and Glacier appeared on the Earth.（Additional information is available in the comments）

Additional information : Glacier is a form of water, it is snow transformation. Through a series of changes to form ice must first have a certain number of solid precipitation, including snow, fog, hail, etc. There is not enough solid precipitation as "raw material", means "bricks without straw", is simply not form ice. Ice exists in extremely cold places. The earth is at the age of cold in the arctic and Antarctic, in other regions can only glacial high altitude mountain. People know that the farther the lower the high temperature, when more than a certain height above sea level, the temperature will fall below 0 ℃, landing solid-state precipitation can be perennial. The altitude glaciologist called snow line .

]]> 2020-03-26 08:26:49 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/475908092 qzhao714 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/476073693 Two and a half billion years ago, free oxygen formed in the oceans and atmosphere.]]> 2020-03-26 09:56:58 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/476073693 qzhao714 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/476097774 1,600,000,000 years ago, eukaryotic cells appeared.]]> 2020-03-26 10:09:05 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/476097774 qzhao714 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/476117252 510,000,000 years ago, vertebrates appeared in the oceans.]]> 2020-03-26 10:19:02 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/476117252 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477760734 420,000,000 years ago,because some creatures continuous evolutioned,plants and coral reefs appeared.]]> 2020-03-27 07:06:40 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477760734 qzhao714 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477776228 400,000,000 years ago,  primeval forest appeared.]]> 2020-03-27 07:25:32 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477776228 qzhao714 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477787700 380,000,000 years ago, the earth's rotation speed changed the day into 22 hours.]]> 2020-03-27 07:38:14 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477787700 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477810892 375,000,000 years ago,vertebrates evolutioned,and limbic vertebrate appeared.]]> 2020-03-27 08:00:08 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477810892 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477816529 350,000,000 years ago,the sea creatures had been successful landed.]]> 2020-03-27 08:05:09 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477816529 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477822207 300,000,000 years ago,limbic vertebrates' legs became stronger,and primintive reptiles appears.]]> 2020-03-27 08:10:05 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477822207 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477826973 230,000,000 years ago,dinosaurs appeared and seek hegemony the earth.（Additional information is available in the comments）

Dinosaurs lived during the Mesozoic era, which ranged from 251 million years ago to 65 million years ago, beginning with the permian-triassic extinction event and ending with the cretaceous-tertiary extinction event, spanning 180 million years. The Mesozoic can be divided into the following three periods: Triassic period : 251 million years ago to 199.6 million years ago. Jurassic: 199.6 million years ago to 145.5 million years ago. Cretaceous : 145.5 million years ago to 65.5 million years ago.]]> 2020-03-27 08:13:47 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477826973 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477829727 199,000,000 years ago,a part of reptiles evolutioned the flying skill.]]> 2020-03-27 08:15:54 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477829727 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477844984 65,000,000 years ago,maybe is the asteroid to hit the earth,the dinosaurs extinction.]]> 2020-03-27 08:27:14 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477844984 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477928272 63,000,000 years ago,placental mammals appeared.]]> 2020-03-27 09:18:33 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/477928272 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/478030027 45,000,000 years ago,modern mammals appeared.]]> 2020-03-27 10:13:56 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/478030027 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/478058152 And humans developed science and technology economy.This is the earth look like now.Our blue home.]]> 2020-03-27 10:28:28 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/478058152 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/478067426 6,000,000 years ago,anthropoid chimpanzees appeared.]]> 2020-03-27 10:33:22 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/478067426 Ruby21127 https://padlet.com/Ruby21127/q71nx1op2pa3/wish/478072819 Anthropoid chempanzees continuous evolutioned.After some years,humans comed into being.（Human evolution：Australopithecus > Homo habilis > Homo erectus > Homo sapiens.）]]> 2020-03-27 10:35:59 UTC https://padlet.com/Ruby21127/q71nx1op2pa3/wish/478072819