Twenty-three years ago, in his Design Principles and Design Patterns article, Robert "Uncle Bob" Martin boiled down the Liskov substitution principle to the idea that "derived classes should be ...

Rudolf Virchow, a 19th-century Prussian pathologist, considered organisms a kind of “cellular democracy,” a harmonious republic of cooperating cells. Wilhelm Roux, who studied under Virchow and later ...

Dear Abby: My 32-year-old son has an alcohol problem. He and his wife refuse to accept reality and continue to be social drinkers. My son deals with his problem by putting his head in the sand. He ...

Dungeons & Dragons has unveiled Dr. Dhrolin’s Dictionary of Dinosaurs, a prehistoric-themed sourcebook introducing six new playable dinosaur-inspired species, three subclasses, new backgrounds, and ...

Government plans to make inheritance tax due on pensions, plus other changes to IHT rules, have seen a leap in people enquiring about the use of trusts to protect their wealth. So what are trusts, and ...

Elysse Bell is a finance and business writer for Investopedia. She writes about small business, personal finance, technology, and more. Dr. JeFreda R. Brown is a financial consultant, Certified ...