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To help compare orders of magnitude of different times this page lists times between 320 000 years and 3 200 000 years (10¹³ seconds and 10¹⁴ seconds) See also times of other orders of magnitude.

• Shorter times
• 379,000 years—time after the Big Bang until cosmic microwave background radiation began
• 1 million years—one epoch (3.16 × 10¹³ seconds); average lifespan of a blue supergiant star
• 2.6 million years—duration of the Paleolithic

[edit] Elapsed time

• 500 000 years—time since the colonisation of Eurasia by Homo erectus
• ~700,000 years—time since last reversal of earth's magnetic field
• 790 000 years—age of the earliest evidence of the controlled use of fire by Homo erectus
• 1,500,000 years—time since beginning of Pleistocene Epoch (beginning of Quaternary Period)
• 1,500,000 years—time since end of Pliocene Epoch (end of Tertiary Period)
• 2,500,000 years—approximate age of the genus Homo

[edit] Half lives

• 340,000 years -- half-life of curium-248
• 1,530,000 years -- half-life of zirconium-93
• 2,600,000 years—half-life of technetium-97
• Longer times

v • d • e Orders of magnitude (time), by powers of seconds Negative powers 10−44 s | ... | 10−24 s ... 10−19 s | 10−18 s ... 10−16 s | 10−15 s ... 10−13 s | 10−12 s ... 10−10 s | 10−9 s ... 10−7 s | 10−6 s ... 10−4 s | 10−3 s | 10−2 s | 10−1 s Positive powers 100 s | 10 s | 102 s | 103 s | 104 s | 105 s | 106 s | 107 s | 108 s | 109 s | 1010 s | 1011 s | 1012 s | 1013 s |1014 s | 1015 s | 1016 s | 1017 s | 1 E18 s and longer