What do hyperbolic crochet and coral reef organisms have in common? They both evolved to maximize surface area within a limited volume. So, naturally, a crafty and talented group of mathematicians at ...

This is a hyperbolic pseudosphere—made with nothing more than yarn and a crochet hook. Hyperbolic geometry describes surfaces that are negatively curved. If you're enjoying this article, consider ...

This fall, a different kind of coral reef will be on display in the National Museum of Natural History's Ocean Hall. It's not made out of the calcium carbonate skeletons of living coral. It's made out ...