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- Sweet Confusion: Does high fructose corn syrup deserve such a bad rap?
- Closed Thinking: Without scientific competition and open debate, much psychology research goes nowhere
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- Fuzzy future: Kids may suffer impaired vision from spending too little time outdoors, studies suggest
- Building with moon rocks: Working on the moon with lunar soil and grit could prove easier, more efficient and less costly than using earthly materials
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Web edition: December 30, 2010
Print edition: January 15, 2011; Vol.179 #2 (p. 4)
MAN-MADE DIAMONDS ONE-CARAT SIZE PRODUCED— Large, man-made diamonds, more than a carat in size, have been produced for the first time. The diamonds are dark in color and cannot now be used for industrial purposes because of structural imperfections. They were made at the General Electric Research Laboratory, Schenectady, N. Y., where the first man-made diamonds were also made. Small man-made diamonds have been perfected to the point where they are superior to natural diamonds for many uses. These small diamonds are used for cutting, grinding and polishing. Industry uses carat-size diamonds for drills, dressing tools, dies and single point cutting tools. The major source of natural diamonds is the Congo.
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