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The weekend launch of ISS-RapidScat onboard SpaceX-4 has kickstarted a new era for the International Space Station as a giant Earth-observing satellite.
With support from NASA, the EPA has developed an app to track algae that can threaten fresh water supplies.
Predicting floods is notoriously tricky. Sponsored by NASA, a new computer tool known as the "Global Flood Monitoring System" is improving forecasts.
NASA-supported researchers have found that ice covering Greenland is melting faster than previously thought. The action is happening out of sight, below the surface.