Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.
Jana and her husband, Stephen Wissmann, announced in August that they are expecting their first baby. Weeks later, Jana’s ...
The impending budget has been billed as a mixture of austerity and big spending. Here’s everything you need to know.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback