Main Page | See live article | Alphabetical index MYA is an acronym used by geologists and paleontologists for "Million Years Ago". Other less than obvious abbreviations that might be encountered in similar contexts are BP (Before Present), TYA (Thousand years ago), GYA (Gigayears ago -- i.e a thousand million years), BCE (Before Christian Era = BC in common usage), and the somewhat Americentric Bya (Billion Years Ago. == thousand million years = GYA). This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.