To celebrate the 50th anniversary of Earth Day this week, we're doing an Earth-themed takeover! We're kicking off the week with an episode of the . NASA doesn't only focus on what is in outer space, but also does . NASA looks into how our planet works and changes over time. NASA missions dedicated to Earth sciences detect and track wildfires, monitor air pollution, and use data to develop models to predict future changes. In the last 50 years, we have come a long way in our understanding of Earth, as well as identifying the many ways we can better protect our only home.
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