A billion

The next time you hear a politician use the word "billion," casually:

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.. A billion seconds ago it was 1959.

b.. A billion minutes ago Jesus was alive.

c.. A billion hours ago our ancestors were living in the Stone Age.

d.. A billion days ago no-one walked on two feet on earth.

e.. A billion dollars ago was only 8 hours and 20 minutes, at the rate our government spends it.