Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

Ibram X. Kendi is a professor of history, director of the Antiracist Research & Policy Center at American University, and author of How to Be an Antiracist. To fix the original sin of racism, ...

Physics can feel inscrutable to students; this lesson helps them understand a graphing problem by analyzing their own ...

The authors used a Bayesian modeling framework to fit behavior and serotonin neuron activity to reward history across multiple timescales. A key goal was to distinguish value coding from other ...

The most successful technical traders rarely rely on just one signal. Instead, they look to a few go-to indicators for ...

Scott Nevil is an experienced writer and editor with a demonstrated history of publishing content for Investopedia. He goes in-depth to create informative and actionable content around monetary policy ...

The currency value of the SDR is determined by summing the values in U.S. dollars, based on market exchange rates, of a basket of major currencies (the U.S. dollar, Euro, Japanese yen, pound sterling ...