Gigasecond facts for kids

A gigasecond (symbol: Gs) is one billion seconds. That is about 31.7 years. It can be written as 10⁹ seconds.

3.16 Gs is about 1 century (100 years). 31.6 Gs is about 1 millennium (1000 years).

This page lists times of between 1 and 1000 gigaseconds, or between 31.7 and 31,700 years.

• Shorter times
• 351 years – half-life of californium-249
• 367 years – time since the Taj Mahal was built
• 411 years – age of the King James Bible
• 418 years – half life of silver-108
• 432.2 years – half life of americium-241
• 530 years – time since Christopher Columbus reached the New World
• 567 years – time since the printing of the first Gutenberg Bible
• 680 years – half life of niobium-91
• 790 years – amount of time the Zhou Dynasty lasted, the longest dynasty in Chinese history
• 898 years – half life of californium-251
• 969 years – alleged age of Methuselah at death
• 1000 years – one millennium = 3.16 x 10¹⁰ seconds
• 1943 years – time since the volcanic destruction of Pompeii
• 2022 years – time since the birth of Jesus Christ, according to Dionysius Exiguus
• 2065 years – time since the assassination of Julius Caesar
• 2344 years – time since the death of Alexander the Great
• 2420 years – time since the death of Socrates
• 2459 years – age of the Parthenon
• 2774 years – time since Rome was founded, according to legend
• 3,200 years—time since the Greek Dark Ages and the beginning of the Iron Age
• 3,800 years—time since alphabetic writing started
• 4,200 years—time since the completion of Stonehenge.
• 4,569 years—time since the building of the Great Pyramid at Giza.
• 4,851 years—age of oldest living plant, a bristle-cone pine named Methuselah
• 5,715 years -- half-life of Carbon-14
• 6,500 years—time since the invention of the wheel
• 7,370 years—half life of americium-243
• 8,500 years—half life of curium-245
• 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
• 20,300 years -- half life of niobium-94
• 21,000 years—time since the Last Glacial Maximum
• 24,110 years -- half life of plutonium-239
• 29,000 years—time since the extinction of Homo neanderthalensis.
• Longer times