Poisson’s ratio mechanics Written and fact-checked by Britannica Editors Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Britannica Editors Last updated Nov. 20, 2025 •History Poisson’s ratio, in mechanics, a quantity describing how a material behaves when it...

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　　 　　An IPS helps you chart your way and stay on course.© Tad Denson/stock.adobe.com, © Denis Rozhnovsky/stock.adobe.com, © lucky-photo/stock.adobe.com, © Creative Haven/stock.adobe.com; Photo illustration Encyclopædia Britannica, IncEver start a long road trip without directions, or even a plan? Probably not, as that’s a good way to end up lost, far from your destination, or going in circles. It’s a perfect...

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　　 　　Turkey mercy U.S. Pres. Barack Obama pardoning a turkey on Thanksgiving Day in 2015. (more) Why Do We Pardon Turkeys on Thanksgiving? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/Why-Do-We-Pardon-Turkeys-on-Thanksgiving Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select...

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　　 　　What to know about filing taxes after a divorce.© gigra/stock.adobe.com, © tiero/stock.adobe.com, © LIGHTFIELD STUDIOS/stock.adobe.com; Photo illustration Encyclopædia Britannica, IncDivorce can be complicated on many fronts—emotional, legal, and financial. And the financial side often presents itself in unexpected ways, especially at tax time. How you and your ex divide assets, handle alimony, and decide who claims the kids can...

　　 　　John Howard Griffin John Howard Griffin, author of Black Like Me (1961). (more) Black like Me work by Griffin Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/Black-like-Me Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required)...

　　 　　Powerful tools to help you choose from the universe of funds.© Alexandr/stock.adobe.com, © CaptureAndCompose/stock.adobe.com; Photo illustration Encyclopædia Britannica, IncIf you’re researching mutual funds for your 401(k) plan or browsing investment options through your brokerage account, you’ve likely come across star ratings or a “style box.” 　　Stars and style have nothing to do with movies or fashion, but everything to...

　　Duchenne muscular dystrophy neuromuscular disease Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/Duchenne-muscular-dystrophy 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...

　　 　　Quad leaders From left to right: U.S. Pres. Joe Biden, Australian Prime Minister Anthony Albanese, Japanese Prime Minister Fumio Kishida, and Indian Prime Minister Narendra Modi during the Quad Leaders' Summit at the G7 Summit, Hiroshima, Japan, May 20, 2023. (more) The Quad international security grouping Also known as: QSD, Quadrilateral Security Dialogue Written by Andrew Pereira Andrew Pereira...

　　 　　Plan for the fun years without shortchanging the rest.© Mirko Vitali/stock.adobe.comYou’ve run the numbers and decided you can finally stop working. Perhaps you used the FIRE method (financial independence, retire early), the 4% rule, or another retirement income strategy to get there. You’ve mapped out your Social Security benefits and planned your withdrawals from your retirement savings. You feel...