This is worth looking at, if you haven't seen it orbiting the Internet: A blue speck in the great nothingness: An old view revisited (my title) The old view is of the earth from Apollo. The revisionist view is simply a reminder that the earth is finally fragile and the arc of the story is from me to we.  We're moving from I-earth to We-earth.  Slow as that is.  The actual title of this is, "Some Strange Things Are Happening to Astronauts Returning to Earth."