1 E11 s

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To help compare orders of magnitude of different times this page lists times between 10¹¹ seconds and 10¹² seconds (3,200 years and 32,000 years) See also times of other orders of magnitude.

• Shorter times

• 5125.36 years (1,872,000 days) -- one piktun in the Mesoamerican Long Count calendar
• 12,059 years -- one orbit of Sedna

Elapsed time

• 3,200 years -- time since the Greek Dark Ages and the beginning of the Iron Age
• 3453 years—time since The Exodus from Egypt
• 3,800 years -- time since alphabetic writing emerged
• 4200 years—time (estimated) since the completion of Stonehenge.
• 4,500 years—approximate time since the domestication of the horse
• 4569 years—time, in 2009, since the building of the Great Pyramid at Giza.
• 4,700 years—estimated age of oldest living plant, a bristle-cone pine
• 4,707 years -- Year of the Chinese calendar in 2009
• 5,110 years -- Year of the Hindu calendar in 2009
• 5,300 years -- time since Sumerians developed cuneiform writing (and thus the boundary between history and prehistory)
• 5,400 years —- time since Neolithic Age ended and Bronze Age began
• 5,770 years -- Year of the Jewish calendar in September 2009; also 5,769 years since the creation of the world, according to Rabbinic scholarship.
• 6,013 years -- age of the earth (in 2009) according to the calculation of Bishop James Ussher
• 6,249 years -- time since the earliest known date, the beginning of the Egyptian calendar.
• 6,500 years [3500 in the Dutch version of Wikipedia] -- time since the invention of the wheel
• 11,000 years—time since city of Jericho was founded
• 12,000 years -- time since end of Pleistocene Epoch
• 12,000 years—time since beginning of Holocene Epoch
• 12,000 years —- time since beginning of Neolithic Age
• 12,000 years —- time since the land ice left Denmark and southern Sweden
• 20,000 years —- approximate age of the Ishango Bone, the oldest known tally stick
• 21,000 years —- time since the Last Glacial Maximum
• 25,000 years —- time since the first colonisation of North America
• 29,000 years —- time since the extinction of Homo neanderthalensis.
• 30,000 years —- approximate age of Haplogroup X (mtDNA) and Haplogroup I (mtDNA)

Half lives

• 5,715 years -- half-life of Carbon-14
• 7,370 years—half life of americium-243
• 8,500 years—half life of curium-245
• 20,300 years -- half life of niobium-94
• 24,110 years -- half life of plutonium-239

• Longer times