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

Many solar eclipse maps use clean lines to represent the path of totality, but the reality isn't so clear cut, and those maps ...

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

Choose your circle with impassioned intention or risk your circle choosing you. Tony Tritt is a husband, father and “Big-T” ...