Briny water may be at work in seasonal flows on Mars


Dark, finger-like features that appear and extend down some Martian slopes during the warmest months of the Mars year may show activity of salty water on Mars. They fade in winter, then recur the next…

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Messenger orbital data confirm theories, reveal surprises


On March 18, 2011, the MESSENGER spacecraft entered orbit around Mercury to become that planet’s first orbiter. The spacecraft’s instruments are making a complete reconnaissance of the planet’s geochemistry, geophysics, geologic history, atmosphere, magnetosphere, and…

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