Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr, where ...

YAMAHA explains a diamond needle is used to cut 'a continuous spiral groove into an aluminum disc covered in lacquer'. "This groove, which runs from the outside of the disc to the inside, is an analog ...

And if you'd like even more yarn craft inspiration, don't miss our crochet patterns for babies, too. Beginner, intermediate and advanced knitters, grab your needles and yarn and get started on one of ...

Evidence suggests continuous learning is a resolution you'll want to keep. Harvard Business Review suggests that skills-based hiring is increasingly important to corporate recruitment strategies.

Why it's so special: This image of a spiral galaxy taken by the Hubble Space Telescope is a portrait more than two decades in the making. Like most full-color images of space objects, it's a ...