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Emerald Years
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Giga-annum
It is commonly used in scientific disciplines such as cosmology and geology to signify extremely long time periods in the past. For example, the formation of the Earth occurred approximately 4.57 Ga (4.57 billion years) ago.
One thousand million is also known as a billion.
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Continue Learning about Other Math
How many thousands of years ago is 3 million years?
One million is one thousand thousands. Three million is then three thousand thousands.
How does one million compare to one thousand?
One million is one thousand times one thousand
Is One hundred thousand is a million?
One hundred thousand is not a million.
What is one hundred thousand years called?
One centomillenium.
A thousand million equals what?
One thousand million equals one billion.
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