A bizarre "Rule of Four" has been identified in the basic structure of the majority of inorganic materials—and scientists are stumped as to why. The pattern is found in the so-called "unit cell" of ...
A rule known as the endangerment finding requires the E.P.A. to regulate greenhouse gases. It has proved resilient against earlier attacks. By Karen Zraick and Lisa Friedman For years, the fossil fuel ...
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