首页 > Term: age of earth
age of earth
4. 55 billion years. Formed by particles of gas and denser materials once ejected from exploding supernovae and gradually pulled together by gravity.
- 词性: noun
- 行业/领域: 生物学
- 类别 生态学
- Company: Terrapsych.com
0
创建者
- Surus
- 3.03% positive feedback