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Gigasecond Facts for Kids. Kiddle Encyclopedia.
A gigasecond (symbol: Gs) is one billion seconds. That is about 31.7 years. It can be written as 10^{9} seconds.
3.16 Gs is about 1 century (100 years). 31.6 Gs is about 1 millennium (1000 years).
This page lists times times of between 1 and 1000 gigaseconds, or between 31.7 and 31,700 years.
 Shorter times
 351 years – halflife of californium249
 364 years – time since the Taj Mahal was built
 408 years – age of the King James Bible
 418 years – half life of silver108
 432.2 years – half life of americium241
 527 years – time since Christopher Columbus reached the New World
 564 years – time since the printing of the first Gutenberg Bible
 680 years – half life of niobium91
 790 years – amount of time the Zhou Dynasty lasted, the longest dynasty in Chinese history
 898 years – half life of californium251
 969 years – alleged age of Methuselah at death
 1000 years – one millennium = 3.16 x 10^{10} seconds
 1940 years – time since the volcanic destruction of Pompeii
 2019 years – time since the birth of Jesus Christ, according to Dionysius Exiguus
 2062 years – time since the assassination of Julius Caesar
 2341 years – time since the death of Alexander the Great
 2417 years – time since the death of Socrates
 2456 years – age of the Parthenon
 2771 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.
 4,700 years—age of oldest living plant, a bristlecone pine
 5,715 years  halflife of Carbon14
 6,500 years—time since the invention of the wheel
 7,370 years—half life of americium243
 8,500 years—half life of curium245
 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 niobium94
 21,000 years—time since the Last Glacial Maximum
 24,110 years  half life of plutonium239
 29,000 years—time since the extinction of Homo neanderthalensis.
 Longer times
