Matches in DBpedia 2014 for { ?s ?p In astronomy, geology, and paleontology, bya or "b.y.a." is an initialism for billion years ago. This abbreviation is commonly[citation needed] used as a unit of time to denote length of time before the present. Specifically, one bya is equal to 109 years ago.The "billion" in bya is, by convention, the 109 "billion" of the short scale of the U.S., not the long-scale 1012 "billion" of some European usage.. }
Showing items 1 to 1 of
1
with 100 items per page.
- Bya comment "In astronomy, geology, and paleontology, bya or "b.y.a." is an initialism for billion years ago. This abbreviation is commonly[citation needed] used as a unit of time to denote length of time before the present. Specifically, one bya is equal to 109 years ago.The "billion" in bya is, by convention, the 109 "billion" of the short scale of the U.S., not the long-scale 1012 "billion" of some European usage.".