1,000,000,000 (one billion, short scale; one thousand million or milliard, yard, long scale) is the natural number following 999,999,999 and preceding 1,000,000,001. One billion can also be written as b or bn.
In scientific notation, it is written as 1 × 109.
Previously in British English (but not in American English), the word “billion” referred exclusively to a million millions (1,000,000,000,000). However, this is no longer as common as earlier, and the word has been used to mean one thousand million (1,000,000,000) for some time. The alternative term “one thousand million” is mainly used in the U.K., or countries such as Spain that uses “one thousand million” as one million million constitutes a billion. The worded figure, as opposed to the numerical figure (one thousand million/$1,000,000,000) is used to differentiate between “one thousand million” or “one billion”.
A billion is a huge amount to fathom. Usually people use Money to help express it’s vastness but this example will use time to show just how large it really is!
A Billion years ago, Earth was one big land mass, called Rodinia
A billion months ago, Dinosaurs roamed the Earth
A billion days ago, no one walked on Earth on two feet
A billion hours ago, our ancestors were living in the stone age
A billion minutes ago, Jesus was alive
A billion seconds ago, was 1959
A billion Milliseconds ago, is almost 2 weeks ago