In my neighbor's yard I spotted this plant. This got me thinking about frieze groups. A frieze is a long rectangular strip having some symmetry.

It requires paper heart cutouts, two rectangular-shaped pieces of paper, glue and markers. To make the interactive card, ZiZou takes a long, rectangular strip of paper that’s as wide as a hand.

The Möbius strip has inspired artists — such as Maurits Escher — as well as mathematicians. M.C. Escher Eugene Starostin's desk is littered with rectangular pieces of paper.

The two academics have discovered how to predict the shape of a Möbius strip, the 'endless ribbon' which is obtained by taking a rectangular strip of paper, twisting one end through 180 degrees ...