Created by a globetrotter, the 55-gallon barrel became one of the best-traveled inventions in human history. An Object Lesson. The tiny tool has held up Roman togas and decorated punk rockers. Now, it ...

Around the world, the document establishes legal, social, and economic legitimacy. But it also makes compromises. An Object Lesson. Carl Linnaeus, the father of biological taxonomy, also had a hand in ...