In geometry, there are surfaces that do without an inside or outside—and some need at least four dimensions to exist ...

Get mathy with your crochet! Learn how to create a mobius strip using crochet stitches—as simple or as complicated as you like. This technique is perfect for a cozy ear warmer headband or scarves.

Just like a Möbius strip made of paper, when this DNA Möbius strip is cut down the middle, it generates a loop half as narrow and twice as long as the original, with four half turns (a twist of 720o) ...