clipped from clipmarks.com What is a Billion? clipped from content3.clipmarks.com A billion is a difficult number to comprehend, but one advertising agency did a good job of putting that figure into some 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 the earth on two feet. E.  A billion dollars ago was only 8 hours and 20 minutes, at the rate our government  is  spending  it.