1 E15 s

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Orders of magnitude (time) in E notation
Planck time 1 E-25 s 1 E-24 s 1 E-21 s 1 E-18 s 1 E-17 s 1 E-16 s 1 E-15 s 1 E-14 s 1 E-13 s 1 E-12 s 1 E-11 s 1 E-10 s 1 E-9 s 1 E-8 s 1 E-7 s 1 E-6 s 1 E-5 s 1 E-4 s 1 E-3 s 1 E-2 s 1 E-1 s	1 E0 s 1 E1 s 1 E2 s 1 E3 s 1 E4 s 1 E5 s 1 E6 s 1 E7 s 1 E8 s 1 E9 s 1 E10 s 1 E11 s 1 E12 s 1 E13 s 1 E14 s 1 E15 s 1 E16 s 1 E17 s 1 E18 s 1 E19 s and more
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To help compare orders of magnitude of different times this page lists times between 10¹⁵ seconds (a petasecond) and 10¹⁶ seconds (32 million years and 320 million years) See also times of other orders of magnitude.

• Shorter times
• 34 million years -- time since the evolution of the cat.
• 34.7 million years -- half-life of niobium-92
• 36 million years -- time since end of Eocene Epoch and beginning of Oligocene Epoch; age of the Cercopithecidae (Old World primates) superfamily.
• 40 million years -- estimated period of time until Australia will collide with Asia; time since the age of the Catarrhini parvorder. Time since the evolution of the first canines.
• 49 million years -- time since the whales returned to the water.
• 60 million years -- time since the evolution of the first primates.
• 65 million years -- time since Cretaceous-Tertiary extinction event at end of Cretaceous Period (end of Mesozoic Era) and beginning of Tertiary Period (beginning of Cenozoic Era). Cretaceous mass extinction; end of the age of the dinosaurs.
• 135 million years -- time since end of Jurassic and beginning of Cretaceous Period.
• 195 million years -- time since end of Triassic and beginning of Jurassic Period; time since the appearance of the earliest mammals.
• 250 million years -- Galactic year - a revolution around the center of the Milky way of our Sun and the Solar system.
• 251.4 million years -- time since the Permian mass extinction. End of Permian Period and of the Palaeozoic Era. Beginning of Triassic Period, the Mesozoic era and of the age of the dinosaurs.
• 280 million years -- time since end of Carboniferous and beginning of Permian Period.
• Longer times

v • d • e Orders of magnitude (time), by powers of seconds Negative powers 10−44 s | ... | 10−25 s | 10−24 s ... 10−22 s | 10−21 s ... 10−19 s | 10−18 s ... 10−16 s | 10−15 s ... 10−13 s | 10−12 s | 10−11 s | 10−10 s | 10−9 s | 10−8 s | 10−7 s | 10−6 s | 10−5 s | 10−4 s | 10−3 s | 10−2 s | 10−1 s Positive powers 1 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 | 1018 s | 1019 s and more