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

Helping students to develop math fluency takes more than just flash cards. It requires teaching them how to think about ...

A new collection of research papers examines how humans conceptualize numbers and the numeral systems we’ve build around them ...

The news of the layoffs came in a scheduled message from the dean. Around 7:40 or 8 a.m., Yoon received another email from his manager requesting a meeting — he took it as another bad sign. He’d been ...

China’s reported current account surplus understates China’s contribution to global trade imbalances. The massive gap between China’s export and import volume growth over the last six years tells a ...

A 4% reduction in domestic flights went into effect at 6 a.m. ET following an order last night from the Federal Aviation Administration. Follow for live news updates.

In 60% of races on Tuesday, there was only one option for voters, or for some roles, no candidate at all. Democracy only ...

Flight delays are expanding as air traffic controller staffing problems persist despite mandated cuts to flights. About 800 flights have been canceled, and Transportation Secretary Sean Duffy warned ...

Trump administration cuts more than 1,000 flights as government shutdown hits travel hard - Trump administration reduces ...