Fifty years ago, on April 22, 1970, people around the world marked the first Earth Day.
Click here for original story, The Blue Marble: The View From Apollo 17
Source: NASA Image of the Day
Fifty years ago, on April 22, 1970, people around the world marked the first Earth Day.
Click here for original story, The Blue Marble: The View From Apollo 17
Source: NASA Image of the Day