An equation of the form \(y = mx + c\) where \(m\) and \(c\) are numbers, gives a straight line when values of \(x\) and corresponding values of \(y\) are plotted on a grid. A straight line is a ...

When Mrs. Smith is murdered, every suspect has a plausible alibi—or so it seems. Can you solve the viral "Who killed Mrs. Smith?" riddle? It possesses all those delicious bells and whistles that help ...

Around A.D. 1250, seeking refuge from some unknown threat, the Anasazi migrated from open villages to nearly inaccessible dwellings. A generation later, they moved again. Douglas Merriam In 1874, an ...

Bacterial transformation is the stable genetic modification of bacteria with foreign DNA. It is a routine procedure in molecular biology, most commonly practiced as the introduction of a DNA plasmid ...