Just listened to last Friday's Front Row, and have found out that the institute of figuring have produced
a model of the Great Barrier Reef and it's on display at the Hayward! Apparently the Great Barrier Reef is a hyperbolic surface.
Someone on Front Row (I think someone from the institute of figuring) said that a female lecturer (who wiki tells me is
Daina Taimina) invented hyperbolic crocheting when her husband said to her that one couldn't produce physical models of hyperbolic surfaces, and hyperbolic crocheting gave the first physical models of hyperbolic surfaces. Which makes me wonder what M. C. Escher's
picture of Angel's and Demons is other than a model of the hyperbolic plane, tessellated by roughly triangular shaped angels and demons. But, even if they were slightly off factually, hyperbolic crocheting is damn cool, and it was cool to hear them talk about it on Front Row. Here is a
gallery of crocheted hyperbolic spaces at the institute of figuring.