Did you know? Time since building of the Great Pyramid of Giza / Cheops / Khufu (4,580 y) is 10 x Time since the birth of Shakespeare (460 y)
Time since the start of the last glacial period (Ice Age) (110,000 y)
/fact/time-since-the-start-of-the-last-glacial-period-ice-age
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If this was a standard unit ...