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  William Moulton Marston 　　 　　William Moulton Marston, a pioneer in developing the lie detector American psychologist William Moulton Marston (seated, right) using the systolic blood pressure deception test, an early version of the lie detector, to check the pulse and blood pressure of James Alphonso Frye (center, wearing a white shirt) in 1926. The photo is a reenactment of Marston's use of the...
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  What Are Torpedo Bats? 　　 　　Torpedo bat vs. traditional bat The newly designed torpedo bat (left) next to a conventionally shaped bat in the dugout during a Toronto Blue Jays–Washington Nationals game in Toronto, March 31, 2025. (more) What Are Torpedo Bats? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/sports/What-Are-Torpedo-Bats Feedback Corrections? Updates? Omissions? Let...
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  How Hot Is the Sun? 　　 　　Sun without sunspots In January 2018 the Sun had no sunspots for almost two weeks. This spotless period was a prelude to an approaching period of solar minimum in 2019, when the sun's activity was at the low end of its 11-year cycle. (more) How Hot Is the Sun? Ask the Chatbot a Question More Actions Share Share Share...
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  How Is Sugar Made? 　　 　　Sugar crops Structures of the sugarcane (left) and sugar beet (right). (more) How Is Sugar Made? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/technology/How-is-Sugar-Made Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar...
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  How Was Mount Rushmore Built? 　　 　　Mount Rushmore National Memorial Sculpture of Abraham Lincoln under construction in the 1930s, Mount Rushmore National Memorial, southwestern South Dakota, U.S. (more) How Was Mount Rushmore Built? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/art/How-Was-Mount-Rushmore-Built Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article...
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  Marcus Samuelsson 　　 　　Marcus Samuelsson Chef and restaurateur Marcus Samuelsson, 2022. (more) Marcus Samuelsson Ethiopian-born chef Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/biography/Marcus-Samuelsson Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction...
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  What’s the Difference Between a Symphony and an Orchestra? 　　 　　Orchestra An orchestra performing at the Hatch Memorial Shell in Boston. (more) What’s the Difference Between a Symphony and an Orchestra? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/art/Whats-the-Difference-Between-a-Symphony-and-an-Orchestra Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a...
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  perseveration 　　perseveration psychology Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/perseveration Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you for your feedback...
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  Can a U.S. President Serve a Third Term? 　　 　　Franklin D. Roosevelt The only U.S. president to have been elected to the office more than twice is Franklin D. Roosevelt. He was elected a third time in 1940 and a fourth time in 1944. (more) Can a U.S. President Serve a Third Term? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X...
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  How Much Does an Elephant Weigh? 　　 　　The largest living land mammal on Earth African bush elephant (Loxodonta africana). (more) How Much Does an Elephant Weigh? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/How-Much-Does-an-Elephant-Weigh Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required)...
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  Why Is Cashmere Expensive? 　　 　　Can I rub your belly? The undercoat of this Kashmir goat—and some of his friends—will be carefully plucked to create a cashmere sweater. The scarcity of the wool and the highly labor-intensive manner of collection adds to the cost of that sweater. (more) Why Is Cashmere Expensive? Ask the Chatbot a Question More Actions Share Share Share to social...
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  spectral line 　　 　　Balmer series of hydrogen spectral lines The Balmer series of atomic hydrogen. These spectral lines are emitted when the electron in the hydrogen atom transitions from the n = 3 or greater orbital down to the n = 2 orbital. The wavelengths of these lines are given by 1/λ = RH (1/4 − 1/n2), where λ is the wavelength,...
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  Léa Seydoux 　　 　　Léa Seydoux French film actress Léa Seydoux, 2019. (more) Léa Seydoux French actress Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/biography/Lea-Seydoux Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction...
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  purseweb spider 　　 　　Atlantic purseweb spider A male Atlantic purseweb spider (Sphodros atlanticus) in search of a mate. (more) purseweb spider arachnid Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/animal/purseweb-spider Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required)...
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  Michael Schur 　　 　　Michael Schur American television producer and writer Michael Schur at the premiere of the Netflix series A Man on the Inside, which he created, Los Angeles, November 10, 2024. (more) Michael Schur American television writer, producer, director, and actor Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/biography/Michael-Schur Feedback Corrections? Updates?...
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  Common Sense 　　 　　Common Sense Title page from Thomas Paine's pamphlet Common Sense, 1776. (more) Common Sense pamphlet by Thomas Paine, primary source Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/Common-Sense-by-Paine Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type...
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  A Tramp Abroad 　　 　　Mark Twain Mark Twain, author of A Tramp Abroad (1880). (more) A Tramp Abroad travel book by Twain Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/A-Tramp-Abroad Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual...
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  The Shipping News 　　 　　Annie Proulx Annie Proulx, author of The Shipping News (1993), in 2003. (more) The Shipping News novel by Proulx Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/The-Shipping-News-by-Proulx Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required)...
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  Berthe Weill 　　Berthe Weill French art dealer Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/biography/Berthe-Weill Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you...
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  socioeconomic challenges in India 　　 　　Hundred days of work Women working at a mangrove nursery in a village in West Bengal. After Cyclone Yaas flooded the Sundarbans, the state government decided to plant 150 million saplings of mangrove in three districts under the rural employment scheme to protect the regions from future cyclones and floods. (more) socioeconomic challenges in India Ask the Chatbot a...

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