Happy Earth Day!

Today is one day of the year when we try, if only momentarily, to recall that we are not just passengers on this “spaceship Earth“, but, indeed, its crewmembers.

We offer no morals, no platitudes, no adjurations, just a short list of courses, inspired by this particular day, for folks living on our pale blue dot :

Image from “Earthrise Revisted 2013” by NASA Scientific Visualization Studio. [Public domain], via Wikimedia Commons

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