1 E12 s - Definition and Overview

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
• 300 000 years -- time after the Big Bang until cosmic microwave background radiation began
• 301,000 years -- half-life of chlorine-36
• Longer times