The Mathematics Teacher (MT), an official journal of the National Council of Teachers of Mathematics, is devoted to improving mathematics instruction from grade 8-14 and supporting teacher education ...
After 40 yr of nova outburst, there are still some difficulties in completely understanding V1500 Cyg. The faintness of V1500 Cyg and its crowded field pose a challenge for high-precision photometry ...
An engraving of a polar bear hurling a rock at a walrus from Charles Francis Hall's 1865 book Arctic researches, and life among the Esquimaux. Smithsonian Libraries/Public Domain In 1865, Arctic ...
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