Main Page | See live article | Alphabetical index 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 ~600,000 years -- time humans have been able to produce the sounds of spoken languages 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 technetium-97 Longer times This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.