WASHINGTON – Those wondrously intricate tile mosaics that adorn medieval Islamic architecture may cloak a mastery of geometry not matched in the West for hundreds of years. Historians have long ...

Add Yahoo as a preferred source to see more of our stories on Google. Computer generated image of concentric rings around a central shaded hat (dark blue). Look carefully! Mathematicians have invented ...

Consider the tiles on a bathroom floor or wall; they’re often arranged in a repeating pattern. But is there a single shape that tiles such a surface — an infinite one — in a pattern that never repeats ...