Tya 2899801 225233511 2008-07-12T16:33:33Z SmackBot 433328 Date the maintenance tags or general fixes {{lowercase|title=tya}} {{Unreferenced|date=July 2008}} In [[astronomy]], [[geology]], and [[paleontology]], '''tya''', sometimes also '''kya''', is an [[acronym]] for '''thousand years ago''' and is used as a unit of [[time]] to denote length of time before the present. The once popular term 'kya' is replaced in modern scientific literature with the [[SI]] unit ka ([[annum|kiloannum]]).{{Fact|date=July 2008}} == See also == * [[annum]] * [[Before Present]] * [[Gya]] * [[bya]] * [[mya (unit)]] [[Category:Units of time]] [[hu:Kilo-annum]] [[nl:Ka (tijd)]]