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1 E12 s
To help compare
orders of magnitude
of different times this page lists times between 32 000
years
and 320 000 years (10
12
seconds
and 10
13
seconds).
See also
times of other orders of magnitude
Shorter times
~75 000 years -- time since a group of humans became the
Australian Aborigines
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
Longer times