This is a weekly wrap of our Daily Knowledge Newsletter. You can get that newsletter for free here. Hobbs and His Lock Picks: The Great Lock Controversy of 1851 In April 1851, Alfred C. Hobbs boarded the steamship Washington bound for Southampton, England. His official duty was to sell the New York City-based company Day and Newell’s newest product – […]
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After just about six months since launching, our Daily Knowledge Podcast has reached 2 million downloads. Thanks for listening! If you have any feedback for us on it, we’re always interested. If you haven’t checked it out, you can listen to the podcast episodes here online, or subscriber via iTunes here, or simply use this xml link to subscribe via […]
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The man who served as the voice of Walt Disney’s iconic Mickey mouse for over 30 years, Wayne Allwine, was married to the woman who voices Minnie Mouse, Russi Taylor. Who knew, right? The two were married for nearly two decades until Wayne Allwine passed away in 2009 due to complications from diabetes. He was only 62. It wasn’t until […]
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On December 21, 1898, Marie and Pierre Curie discovered the radioactive element radium (in the form of radium chloride), extracting it from uraninite. They first removed the uranium from the uraninite sample and then found that the remaining matter was still radioactive, so investigated further. Along with the barium in the remaining substance, they also detected spectral lines that were […]
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America’s Independence Day is celebrated across the country with fireworks, hot weather, pool parties, and barbecues. For the thousands that gather on Coney Island in America’s largest metropolitan, New York City, July Fourth is commemorated with another annual tradition – the Nathan’s Hot Dog Eating Contest. Beginning in 1916, the Hot Dog Eating Contest has become the “de facto Olympics” […]
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mgh23 asks: Why is toilet paper always white? Toilet paper is an odd thing. Despite the fact that we often rub it against one of the most sensitive parts of our bodies on a daily basis, very little thought is ever given to where it came from or how it’s made. (On that note, it might surprise you to learn […]
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Fatima asks: How do 3D printers work? Originally built on the same technology as an ink jet printer, the basic process behind 3D printing is so easy to understand, replicate and implement, today it is used to manufacture everything from toys to body parts. Multiple Layers Fundamentally, 3D printing involves building an object by putting down successive layers of materials, […]
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James asks: Why does it hurt so much when you step on legos with bare feet? Right up there with how the gun on the original Duck Hunt game worked, why it hurts so much to step on a Lego brick is one of the questions we’re asked the most, so it’s high time we answered it. As anyone who’s […]
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Jeff asks: Is it true that wine vinegar is just wine with acetobacter added? Yep, but the process from start to finish is a little more complicated than just that. More than Just Wine Vinegar can be made from any of a variety of carbohydrates: “Fruits, such as apples, grapes, berries, melons and coconuts have been turned into vinegar. Natural […]
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In April 1851, Alfred C. Hobbs boarded the steamship Washington bound for Southampton, England. His official duty was to sell the New York City-based company Day and Newell’s newest product – the parautopic lock – at a trade show – London’s Great Exhibition. But Hobbs had something a bit more nefarious up his sleeve, or rather in the small trunk […]
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This is a weekly wrap of our Daily Knowledge Newsletter. You can get that newsletter for free here. What Causes Dark Circles Under Your Eyes? It is often claimed that periorbital dark circles are caused by tiredness or working too hard or even just staying up late. While this can be true, the truth is that your genes play a […]
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On a cool October night in 1871, 18 Chinese men and boys were massacred by a bloodthirsty mob in Los Angeles. The Cause Debate continues over the actual trigger for the riot, but most commentators point to a fight between rival Chinese gangs in Los Angeles’ then-Chinatown on Calle de los Negros (today part of Los Angeles Street). According to […]
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What Would Jesus Do?, often shortened to WWJD? or W.W.J.D. is a slogan so famous that millions of objects have been emblazoned with it. However, the person who came up with “W.W.J.D.” never saw a penny of the millions of dollars companies across the globe have made from it. The earliest known instance of the full slogan “What Would Jesus Do” […]
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Roy Sullivan was born 1912 in Greene County in central Virginia, today home to just a shade over eighteen thousand people. He was the fourth of eleven children and lived in the Blue Ridge mountains with his family. In 1940, at the age of 28, Sullivan joined the national park’s fire patrol. He became one of three rangers to monitor […]
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Gina asks: What does “al” mean in Arabic? Roughly translated to “the,” the Arabic word “al-” is prefixed to nouns to make them definite. For example: “kitab ‘book’ can be made definite by prefixing it with al-, resulting in al-kitab ‘the book’.” Comprised of two letters, ālif (ā) and Lām (l), frequently, al- is placed in front of proper nouns, […]
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Lake Peigneur is located in Louisiana near the Gulf of Mexico. Before 1980, it was an approximately 10-foot deep fresh water lake with an island in the middle. Next to it, and partially under it, Diamond Crystal Salt Company maintained a salt mine, with salt being mined near the lake since 1919. Around large underground salt domes, you can often […]
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Brian T. asks: Where do the Gypsies originally come from? They do not have a shared homeland or national identity. They are a people who are scattered across the globe and whose origins have always been shrouded in myth and mystery (among other reasons because they have kept no written records of their early history). Many saw them (and continue […]
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Today I found out what makes a boomerang come back. Non-returning boomerangs have been used for at least 20,000-30,000 years, with the oldest known example carved from a mammoth’s tusk. These non-returning boomerangs were used for hunting and were carved for straight flight and to stay in the air as long as possible when thrown correctly. The hunter was then […]
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