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• Shorter times
• 340,000 years -- half-life of curium-248
• ~600,000 years -- time humans have been able to produce the sounds of spoken languages
• ~700,000 years -- time since last reversal of earth's magnetic field
• 1,000,000 years -- the average lifespan of a blue supergiant star
• 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)
• 1,530,000 years -- half-life of zirconium-93
• 2,600,000 years -- half-life of technetiumTechnetium [Gr. technetos artificial] is a chemical element in the periodic table that has the symbol Tc and atomic number 43. A silvery gray, radioactive, crystalline transition metal that is very rarely found in nature, technetium occurs as one of the f-97
• Longer timesTo help compare orders of magnitude of different times this page lists times between 3. 2 million years and 32 million years (1014 seconds and 1015 seconds) See also times of other orders of magnitude. Shorter times 3. 74 million years half-life of mangan