The Concept of a Billion

A billion is a difficult number to comprehend, but one advertising agency did
a good job of putting that figure into perspective in one of its releases:
A billion seconds ago, it was 1959.
A billion minutes ago, Jesus was alive.
A billion hours ago, our ancestors were living in the Stone Age.
A billion dollars ago, it was only 8 hours and 20 minutes ago at the rate
Washington spends it.