保护地球，探索宇宙，发现文明
An illustrated spiral is shown depicting many significant events that have occurred since the big bang. The big bang is at the center, and a city built by humans is at the spiral’s end. Please see the explanation for more detailed information.
这张图所示的时间螺旋，呈现了其中的一些重要里程碑。螺旋的中心是大爆炸，人类建造的城市位于螺旋的末端。有关更多详细信息，请参阅说明。
2023年1月8日 Where Your Elements Came From Image Credit & License: Wikipedia: Cmglee; Data: Jennifer Johnson (OSU) Explanation: The hydrogen in your body, present in every molecule of water, came from the Big Bang. There are no other appreciable sources of hydrogen in the universe. The carbon in your body was made by nuclear fusion in the interior of stars...