NASA’s Cassini orbiter will be ending its mission with a grand finale dive into Saturn’s atmosphere on September 15, but it’s accomplished so much in its nearly 20 years of operation. When it was first launched on October 15, 1997, it was the first mission to be an in-depth study of Saturn and its moons.
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Water enters a plant at the root system and moves upwards through specialized tissue called xylem. Xylem carries water all the way to the plant’s extremities, where some escapes into the air through minute openings in the outer surface. This loss of moisture is called transpiration. In hot conditions, large trees can lose huge volumes
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You’ve heard of fighting fire with water, but did you know that gases also have the power to douse flames? A gas can smother a blaze by creating a barrier between burning fuel and nearby air. Removing any of the three requirements for fire stops the combustion reaction. Image credit: Ohio Northern University Fire
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