2006-09-15 05:45:07 · 21 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Mega-annum
usually abbreviated as Ma, is a unit of time equal to one million (10^6) years. It is commonly used in scientific disciplines such as geology, paleontology, and celestial mechanics to signify very long time periods in the past. For example, the dinosaur species Tyrannosaurus rex flourished approximately 65 Ma (65 million years) ago (ago may not always be mentioned; if the quantity is specified while not explicitly discussing a duration, one can assume that "ago" is implied; "mya" includes "ago" explicitly.). In astronomical applications, the year used is the Julian year of precisely 365.25 days.
2006-09-15 05:50:44 · answer #1 · answered by lufen 3 · 1⤊ 0⤋
A million years
2006-09-15 13:05:02 · answer #2 · answered by Jacques Closeau 2 · 1⤊ 0⤋
You call it a million years
2006-09-15 13:54:51 · answer #3 · answered by Anonymous · 1⤊ 0⤋
a million years
2006-09-15 12:56:24 · answer #4 · answered by tonnage 17 3 · 1⤊ 0⤋
If you are talking about the past, you can use mya (abbreviation of million years ago) but other than that, there isn't a word.
2006-09-16 03:48:37 · answer #5 · answered by Mark R 2 · 0⤊ 0⤋
What about a Thousand Thousand years? Both values are exactly equal, 1000000.
2006-09-15 12:51:43 · answer #6 · answered by Anonymous · 0⤊ 0⤋
In astronomy, geology, and paleontology, mya or "m.y.a." is an acronym for million years ago.
2006-09-15 13:40:37 · answer #7 · answered by Anonymous · 1⤊ 0⤋
A thousand millennia
2006-09-15 12:47:26 · answer #8 · answered by Anonymous · 0⤊ 0⤋
the length of time between Monday morning and Friday afternoon?
2006-09-15 12:52:57 · answer #9 · answered by woodlands127 5 · 1⤊ 1⤋
An Aeon.
Also abbreviated to My, for "Megayear".
2006-09-15 12:48:13 · answer #10 · answered by fiat_knox 4 · 0⤊ 0⤋