This Dec.1972 photo released by NASA shows a view of the Earth as seen by the Apollo 17 crew traveling toward the Moon.
This Dec.1972 photo released by NASA shows a view of the Earth as seen by the Apollo 17 crew traveling toward the Moon. AP file, 2007
This Dec.1972 photo released by NASA shows a view of the Earth as seen by the Apollo 17 crew traveling toward the Moon. AP file, 2007

On Earth Day 2017, science goes on the march

April 20, 2017 08:38 PM

UPDATED April 23, 2017 09:56 AM

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