Mineral Resources
Mercury possesses an abundance of rare and heavy metals that are rare on Earth and unknown in other parts of the Solar System, including: copper; Yttrium, used for armaments (The Demons of Darkside); pitchblende, from which Radium and Uranium can be extracted (A World is Born); and the rare radioactive crystal known as the sun-stone (Shannach – the Last).
Read more about this topic: Mercury In The Fiction Of Leigh Brackett
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“Parents can offer their help by suggesting and locating resources likely to be unfamiliar to children, such as people, books, and materials that can be useful.”
—Dorothy H. Cohen (20th century)