Category Archives: Articles

Do Fish Sleep?

Ryan K. asks: Given that they probably need to move their fins constantly to stay in place, do fish ever sleep? Less like sleep and more like suspended animation, most fish species do spend some time resting. And like us, if they don’t put in enough downtime, they try to make up for it later. Sleep has a simple definition […]

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The Ends Justify the Means

Entangled in Florentine politics during a tumultuous time at the height of the Renaissance, Niccolò Machiavelli became alternately a diplomat, a victim, a prisoner, an exile and, ultimately, the “father of modern political theory.” And although he remains famous today for his well-articulated methods for ruthlessly thriving in a corrupt world, he never said the phrase that is most often […]

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Weekly Wrap Volume 76

This is a weekly wrap of our popular Daily Knowledge Newsletter. You can get that newsletter for free here. Under the Lights On a field about fifty miles from Boston, Strawberry Hill, on the evening of September 3, 1880, history was made. It is unlikely the department store employees who were tossing around a ball knew that this game would […]

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The Vela Incident

As the 1970s were drawing to a close, the global political situation was uncertain. Peace in the Middle East was imminent for some, while others in the region were witnessing dramatic revolution; at the same time, the world’s two great nuclear superpowers had just entered into an historic agreement that significantly limited their nuclear arsenals. Into this mix, in September […]

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Duty Free

Jeremy W. asks: Why do we call non-taxed items duty free? Why is this allowed? Is this really the case or are you supposed to pay taxes anyway on items to your home country? Providing shoppers with a chance to buy and transport goods across international boundaries without paying local and national taxes, duty-free shops are found in airports and […]

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Why are Green Cards Called That?

Amar F. asks: Why are green cards called that when they aren’t green? A Permanent Resident Card from the United States government allows immigrants to legally work, live, and study inside the country. Despite the name “Permanent Resident Card”, it expires after ten years. But those legal residents may apply for citizenship after five years. It is more commonly known […]

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Ketchup or Catsup?

Byron H. asks: Why is it sometimes catsup and other times ketchup? The two distinct spellings for what today is essentially the same condiment are simply the reflection of the evolution of nearly everyone’s favorite French fry topper. (Well, in certain regions of the world.) Today often disdained as low-brow, when it was first conceived, ketchup was revered for the […]

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Why Gnats Swarm

Gerry D. asks: Why do nats swarm in a ball in the air? A common sight in the spring and summer, the seemingly unprofitable and pointless habit of gnats to hover in a cloud is, in fact, the single most productive thing they’ll ever do with their short lives. Although there are a wide variety of non-biting, but eminently annoying, […]

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Elsie Nicks and Akinetic Mutism

Immobile and silent, those who suffer from the severest forms of akinetic mutism either lack the ability or the will to move or to speak. Caused by any of a number of conditions, diseases and injuries, under certain circumstances the disorder can be treated. One of the most remarkable stories of recovery from this devastating condition happened in 1941, when […]

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Why Do Baseball Managers Wear the Team’s Uniform Instead of a Suit Like In Other Sports?

Denny G. asks: Why do baseball managers wear the team’s uniform instead of a suit or something like that like you see in other sports? It especially seems weird because managers in baseball seem to universally let themselves go after their playing days are over and tubby old men do not look good in sports uniforms! Football coaches wear clothes […]

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