1 E17 S

• 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 the Earth (see: Precambrian)
• 10,000 million years — expected main sequence lifetime of a G2 dwarf star (like the Sun)
• 13,700 200 million years (4e17 seconds) — estimated age of the universe according to the Big Bang theory
• Longer times

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701 724 737 718 872 1028 1019 570 571 572 379	1 e 13 m 1 e 11 m 1 e 9 m 1 e26 m 1320 1350s 1 e 43 s 1 e12 s 1 e11 s 1 e 9 s 1 e 44 s	1 e13 s 1 e14 s 1 e15 s 1 e16 s 1 e 13 j 1534 1536 1323 1346 1348 1360s	1364 1365 1388 1394 1415 1431 1437 1457 1458 1 e2 kg 1196