One billion seconds ago is roughly the equivalent of 31.7 years ago, using the US definition of one billion. One billion is one thousand millions.
That's called a millenium.
One thousand million of anything is a billion of it.
A unit of mass equal to one thousand kilograms is called a megagram.
One Thousand years.
One thousand years ago.
one thousand years ago when i wasnt born yet
One million is one thousand thousands. Three million is then three thousand thousands.
That is one millennium.
A period of 1 thousand year is called a millennium.
Monophonic
One centomillenium.
One billion seconds ago is roughly the equivalent of 31.7 years ago, using the US definition of one billion. One billion is one thousand millions.
That's called a millenium.
It was already the year 1000. That was 1,013 years ago. One thousand years from now will be the calendar year 3013.
500 years ago it meant the same thing that it means today - that is, to profess the One True Faith founded by Christ Jesus over two thousand years ago - the Catholic Faith.
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.