While building a simpler model for particle interactions, physicists found a new representation involving pi—not a new value for pi, and not a replacement for the one you learned in school.

More than a third of U.S. adults don’t have the means to pay a $400 unexpected expense without borrowing, a recent Federal Reserve study found, but 59 percent faced such an expense within the prior 12 ...

The S&P 500 and the Nasdaq rose solidly after a shaky start on Monday, as technology stocks found their footing following last week's AI-sparked selloff, while investors waited for key economic data ...