Interstellar visitor 3I/ATLAS has just been subjected to one of the most sensitive alien-technology checks ever mounted on a ...

Feedback refers to a core concept in circuit design and control theory, used to stabilize amplifiers and control system ...

Gray code is a systematic ordering of binary numbers in a way that each successive value differs from the previous one in ...

Explore how backward induction helps solve game theory problems by working from the end backward to determine optimal actions. Learn with practical examples.

This article mentions suicide. If you or someone you know is struggling or in crisis, help is available. Call or text 988 or chat at 988lifeline.org. The 1978 cold case murder of a California high ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

The latest price of gold per ounce, gram, and kilogram using real-time interactive gold price charts. View the price of gold for different currencies around the world and various time periods.

December 28, 2025 • NPR's Ayesha Rascoe plays the puzzle with Mark Karp of Marlboro Township, N.J., and Weekend Edition Puzzlemaster Will Shortz.