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 ...

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 ...

Here is an easy way to add a festive touch to your favorite pie. Custard pies, like cinnamon or sweet potato, are great options for this project. Be sure to prepare one in advance. You will also need ...