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

Flora Tsapovsky is a food, style, culture, and travel writer living in the Bay Area. She specializes in emerging trends, meticulously researched guides, and inspirational personalities. The top of a ...

One of the most respected Microsoft DevOps certifications today is the AZ-400 Microsoft Certified DevOps Engineer Expert. To pass the AZ-400 certification exam, use AZ-400 exam simulators, review ...

This story is part of the KXAN Data Hub, where numbers help tell the whole story. We’ve created several data-driven stories and databases on topics including weather and climate, politics, education, ...