Martin Luther was nothing if not eloquent, on everything both sacred and secular. A sampling of his opinions: On God: “God uses lust to impel men to marriage, ambition to office, avarice to earning, ...

American Journal of Science, November.—Irregular reflection, by C. C. Hutchins. A carefully prepared surface of plaster of Paris, and a deposit of magnesia upon zinc, approximate very closely to ...

Saturn’s oblong moon, Hyperion, reveals its surface variation in a recently released false-colour image taken by NASA’s Cassini spacecraft. Hyperion is exceptionally dark for a Saturnian moon, ...

This news release is available in German. The effect is known from the smart phone: Sun is reflected by the display and hardly anything can be seen. In contrast to this, the glasswing butterfly hardly ...