The year is 3012 AD, and Armstrong's iconic footprint is still present on the moon's surface. But wait a minute, something is missing. Oh yes, it's the Earth.
Of course, the planet Earth will probably still be here a thousand years hence, so the cartoon can be seen as a metaphor for the end of the human race, a more likely scenario in view of all the various ecological and societal problems we face.
AD stands for anno domini, which is Latin for 'in the year of the Lord', in other words after the birth of Jesus Christ. BC (before Christ) is used to denote years before the start of the epoch.
• Bob Englehart cartoon (Hartford Courant)