NASA Astronaut Chris Cassidy Commemorates the 50th Earth Day from the International Space Station

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On the 50th anniversary of Earth Day, NASA astronaut Chris Cassidy of Expedition 63 reflects on what Earth Day means to him.

This Earth Day, we can still collectively appreciate the beauty of our planet and the extraordinary science that helps us understand how it all works — and we can do it from our homes. Join us in commemorating the 50th anniversary with #EarthDayAtHome.

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