我们从哪里来？生命的历史
（版权所有）

•Entire universe arose about 15 billion years ago.

150亿年前宇宙开始形成 
•The solar system started taking shape about 5 billion years ago.

50亿年前太阳系开始出具形态
•The sun ignites as condensed hydrogen gas atoms begin fusing to form helium.

太阳开始燃烧，氢气-氦气 
•The earth starts to coalesce and cool about 4.5 billion years ago.
45亿年前，地球开始凝聚结合冷却成形

•The early earth was rich in water, silica, metals, heavier molecules, and other rocky components. 

早期地球富含水、硅石、金属、大分子及其他岩石成分 
•Early oceans became salty as carbonates, Mg+2, K+, and other ions accumulated as acids (e.g., H2CO3, HNO3, H2SO4) interacted with water and inorganic matter.  

碳酸盐等慢慢形成碳酸、硝酸和硫酸等，早期海洋开始变咸
•Atmosphere arose as the earth formed and as out-gassing occurred from within the earth, CO (carbon monoxide), CO2, H2S (hydrogen sulfide), CH4 (methane), and NH3 (ammonia).  The characteristics of the early atmosphere is based, in part, on what planetary astronomers have discovered from other planets in the solar system.

原始大气
•Conditions on earth, before life began

地球上慢慢形成生命出现的条件
•First protobiont appears about 3.5 billion years ago.

35亿年前，最初的原始生命开始出现  

以下是以24小时周期表述的“生命历史”

转载本文请联系原作者获取授权，同时请注明本文来自潘学峰科学网博客。
链接地址：https://blog.sciencenet.cn/blog-218980-451106.html

上一篇：中国科学院记载着我最美的年华
下一篇：性别的产生