The hypnotic Celtic knot might not be as complicated as it seems. Fourth-year math major Benjamin Liu, from Northampton, Mass., has broken the Celtic knot into 12 standard segments that can be ...

At first glance, Celtic decorative artwork is just an intertwined mass of loops and knots. It usually appears filling the empty spaces of monuments and documents. Looking more closely, one ...

The hypnotic Celtic knot might not be as complicated as it seems. Fourth-year math major Benjamin Liu, from Northampton, Mass., has broken the Celtic knot into 12 standard segments that can be ...