- Shorter times
- 3,500 million years -- age of oldest life (bacteria)
- 3,700 to 3,900 million years -- age of the Mare Ibrium
- 4,500 million years -- age of Earth (see: Precambrian)
- 10,000 million years -- expected Main sequence lifetime of a G2 dwarf star (like the Sun)
- 13,700 ± 200 million years -- estimated age of the Universe according to Big Bang theory
- Longer times