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

In an era when great ideas can sprout from any corner of the world and IT has dramatically reduced the cost of accessing them, it’s now conventional wisdom that virtually no company should innovate on ...

Alena is a professional writer, editor and manager with a lifelong passion for helping others live well. She is also a registered yoga teacher (RYT-200) and a functional medicine certified health ...