Remember the graph paper you used at school, the kind that's covered with tiny squares? It's the perfect illustration of what mathematicians call a "periodic tiling of space", with shapes covering an ...

Greenland is often cited as proof that “marketing works” — that a cold place ...

Scientists just created a pattern that, according to researchers, is impossible to duplicate or forge, a feat that could quash counterfeiters. The key to these patterns lies in a two-step verification ...

In 1982, materials scientist Dan Shechtman observed an unusual tenfold symmetry in an aluminum-manganese alloy, defying the ...