BALTIMORE - Pi Day is the most mathematically delicious day of the year. March 14 -- it's 3.14, which celebrates the number used to calculate the circumference of a circle and an excuse to indulge in ...

An engineer noted for his ability to visualize three-dimensional structure was having coffee and doughnuts. Before he dropped a sugar cube into his cup, he placed the cube on the table and thought, ...

Over 60 years ago, Ralph Fox posed a problem about knots that haunts mathematicians to this day. His question is now often formulated as the “slice-ribbon conjecture,” which posits that two seemingly ...