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People with high blood pressure are often told to watch the salt. And it’s long been thought that hypertension related to excess salt is caused by the salt increasing the volume of the blood. Which in turn puts added pressure on the blood vessel walls

The ocean is a virtually limitless source of water, if we can get the salt out.

NASA will launch a scientific instrument into space next month to measure the salt content of the world's oceans, information that could help confirm scientists' suspicions that climate change is accelerating the world's water cycle. The instrument, Aquarius, will launch June 9 as part of a joint mission between NASA and Argentina's space agency. [More]

This month marks the 100th anniversary of the completion of the Roosevelt Dam in Arizona. It was a major part of the Salt River project, which aimed to create hydroelectric power from the Salt River and make its surrounding lands cultivable. The dam was an engineering marvel and was built as part of the Reclamation Act passed in 1902, which sought to irrigate arid lands in the United States--about one-third of the country’s land at the time