A substance is anhydrous if it contains no water, for example, salts lacking their water of crystallisation. The way of achieving the anhydrous form differs from one substance to another.
A partial solar eclipse at its peak at 3:37 p.m. in Mesa on Oct. 23, 2014. The eclipse was visible over most of North America and covered 44 percent of the Arizona sun. Michael Chow/The Republic.
For the United States, the total solar eclipse will start in Oregon and finish in South Carolina, on Monday, Aug. 21, 2017, almost one hundred years since the last US total solar eclipse of 1918, when the path of totality started on the southwest corner of Washington, then traveled over Denver, Colorado, Jackson, and Mississippi before finally ...