1 E12 s
From Academic Kids
To help compare orders of magnitude of different times this page lists times between 32 000 years and 320 000 years (1012 seconds—a terasecond—and 1013 seconds). See also times of other orders of magnitude
- Shorter times
- ~75 000 years -- time since a group of humans became the Australian Aborigines
- 76 000 years -- half-life of nickel-59
- 90 000 years -- approximate age of Y-chromosomal Adam
- 150 000 years -- approximate age of mitochondrial Eve
- 154 000 years -- half-life of neptunium-236
- 159 200 years -- half-life of uranium-233
- 211 100 years -- half-life of technetium-99
- 300 000 years -- time since Homo sapiens separated from Homo erectus
- 301,000 years -- half-life of chlorine-36
- 379 000 years -- time after the Big Bang until cosmic microwave background radiation began
- Longer times
