Main Page | See live article | Alphabetical index To help compare orders of magnitude of different times this page lists times between 1017 seconds and 1018 seconds (3200 million years and 32 000 million years) See also times of other orders of magnitude. Shorter times 3,500 million years -- age of oldest life (bacteria) 3,700 to 3,900 million years -- age of the Mare Imbrium 4,468 million years -- half-life of uranium-238 4,500 million years -- age of Earth (see: Precambrian) 10,000 million years -- expected Main sequence lifetime of a G2 dwarf star (like the Sun) 13,700 ± 200 million years -- estimated age of the Universe according to Big Bang theory Longer times This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.