Similar to 地球の年齢
0
0▼-1 trends1
12
23
34
45
56
67
78
89
910
1011
11 (number)12
12 (number)13
13 (number)19
19 (number)40
40 (number)70
70 (number)100
100400
400 (number)700
700 (number)1000
1000 (number)1000000
1,000,000死滅放射性核種
Extinct radionuclide天変地異説
Catastrophismモホール計画
Project Mohole地球の構造
Internal structure of Earth第1騎兵師団 (アメリカ軍)
1st Cavalry Division (United States)第1軍 (アメリカ軍)
First Army (United States)