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

Students aren’t necessarily missing the math, they’re missing how to make sense of the problem itself. Once we see ...

As holiday lovers start strategizing their Christmas tree decor, there’s a renewed debate over a real or fake spruce. This ...

Calistoga is joining Napa Valley’s live music landscape with plans for a new multi-day festival at the Calistoga Fairgrounds.

Make a cute pom pom ribbon Christmas tree in about 30 minutes. This beginner-friendly DIY uses a paper cone, pom pom trim, ...

Add a pot beneath the tree by drawing an upside-down trapezoid shape.