Many weather apps use your phone's location services, not just to show your local forecast, but also to calibrate their weather models and improve their overall accuracy.
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There's a humidity type called "absolute humidity" which measures the actual mass of water vapor present in a given volume of air, regardless of temperature. This differs from relative humidity, which is a percentage.
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Satellite imagery is used to track the movement of glaciers, revealing their shrinking size and contributing to our understanding of climate change.
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