As a central coastal California native, the presence of "migrant workers" was a fact of my childhood. During the worst winter storms, our church in San Luis Obispo would gather and deliver canned goods and other necessities for workers who couldn't go to the flooded fields to earn a living.
Read moreEarth's water crisis: A vision from space
About fifteen years ago I took part in a conference on the future of space exploration held at the Rice University campus in Huston. There were a number of talks by philosophers of technology along with a colorful presentation by Story Musgrave, American astronaut who had traveled into space on six NASA missions.
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