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

Start by trimming the tree with your Christmas lighting of choice (you can never go wrong with warm lights, in my opinion), ...

It may take you short of a day to find the perfect Christmas tree for your family, but for those that grow them, it takes ...

So if you’re ready to experience Christmas in a more traditional way, why not try a real Christmas tree this year? The holiday season is upon us, and with it comes the cherished tradition of setting ...