Do not ask me to explain the mathematics of "hyperbolic" because geometry was my worst subject in high school!
This exhibit took my breath away and the pictures will just have to speak for themselves.
A community of crocheters made these wonderful coral shapes. The project was started by two women in California, Margaret and Christine Wertheim, co-founders of the Institute for Figuring (note: my mind cannot fathom such an institute - go figure!).
If you will be in Washington, DC, before April 24, you must see this exhibit! And Washington in the springtime is beautiful.
I believe the exhibit travels, so it may come to your area. If so, see it!