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Michael Freilich was the director of NASA's Earth Science division. He takes us on a 50-year journey, highlighting the way NASA has answered questions we didn't know to ask on the first Earth Day, in 1970.
We're observing Earth Day from home this year. Whether we're curled up on the couch or in the microgravity on the International Space Station, there's a way to appreciate our little rock in space.
Video edited by Katy Mersmann USRA/NASA GSFC
We're observing Earth Day from home this year. Whether we're curled up on the couch or in the microgravity on the International Space Station, there's a way to appreciate our little rock in space.
Video edited by Katy Mersmann USRA/NASA GSFC
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