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

Vikki Velasquez is a researcher and writer who has managed, coordinated, and directed various community and nonprofit organizations. She has conducted in-depth research on social and economic issues ...

Shabana Azmi, who turns 75, has had a distinguished career balancing both parallel and commercial cinema, her individuality ...

But picture books have undergone a revolution in the past 25 years—one that was already underway before that Times obit, but ...

“ Du Iz Tak? IS the greatest picture book of the last 25 years, and I will die on that hill!!!” —Cece Bell, author and ...

This Special Report revisits the 1965 Moynihan report on the state of the black family. The call to action in this new report is clear: Black leaders in religion, politics, media, entertainment, ...

Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, United States ...

Is it possible to have "too many" mutations? What about "too few"? While mutations are necessary for evolution, they can damage existing adaptations as well. The statement that mutations are random is ...