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[DIGEST: NASA, Popular Science]

Every snowflake is unique, but did you know that raindrops come in different sizes? The Global Precipitation Measurement (GPM) satellite mission, a joint venture between NASA and the Japan Aerospace Exploration Agency, allowed scientists to take three-dimensional images of raindrops and snowflakes as they fall and even beforehand, measuring for the first time the sizes and locations of individual drops within storms.

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