Storyboard of Virtual High School Gallery
Show
Geometry: The Language of Art & Science
(Please click on the images to get to the referenced web pages.
Click HERE to find out how to teleport to the gallery in ActiveWorlds)
SYMMETRY
Angelina enters the Gallery Show entitled, Geometry  The Language of Art and Science.... She remembers that she had a tough time in her geometry class last semester. All those numbers and formulae, points, lines and planes. Too many rules to remember  yeesh! And what do they have to do with anything? But this is a show about geometry and art. Well that might be okay..... Inside, Angelina sees her classmate, Sarah who helped work on the gallery show. 

"Are we going to see the basic rules of geometry here?" Angelina asks (thinking of boring points, lines and planes). Oh yes, symmetry, proportion & complexity." she responds. Angelina remembered that it took a long time before those terms come up often in her geometry class. Sarah explains, "Those are the basic rules of geometry  nature's geometry, that is. See here on the wall? " Angelina looks at the wall and sees somewhat familiar shapes. "Radiolaria, buckyballs, crystals, viruses .forms you see on the smallest scale..." says Sarah. "They all have a particular type of symmetry  fivefold symmetry." 




"They are all very beautiful and intricate, but what is fivefold symmetry?" asks Angelina. She clicks on the kiosk and gets to a web page that explains that fivefold symmetry or pentagonal symmetry is very common in living forms around us  flowers, starfish and sand dollars. "Fivefold symmetry is most clearly seen in the dodecahedron  a polyhedron with twelve pentagon faces and the icosahedron with 20 triangular faces." says Sarah as she shows Angelina the icosahedron on the wall. "Wow it sort of looks like a sand dollar or a starfish!" she remarks. They click to VRML polyhedra on Vladimir Bulatov's polyhedra web page and look more closely at the icosahedron and dodecahedron. 



"Fivefold symmetry is the property that makes some of the natural structures we know extremely strong and flexible. That is why viruses are so hard to fight  their structure is based on the icosahedron  scientists did not even know the structure of viruses until they were able to view them with an electron microscope in 1962." Angelina looks at the large tomato bushy stunt virus on the wall  "Wow  it is so beautiful!" Sarah asks her to click on the kiosk to get to a web page on virus structure from London University's biology department 



They move down to
another image on the wall  an Xray
diffraction image of a quasicrystal. Sarah continues to explain, "It
was not until the mid 1980s that scientists discovered that fivefold
symmetry can be found in what we consider to be inanimate matter. With
the discovery of both buckminsterfullerene
and quasicrystals in about 1985, we found fivefold symmetrical forms of
our most common element, carbon and in crystals!" They
click to a page from the University of Japan on quasicrystals to find
out more. 

Sarah continues. "In order to study the structure of quasicrystals and how they grow, we can look at the work of mathematician Roger Penrose, who discovered a way of tiling the plane with fivefold symmetry  they have a very important mathematical property  they are based on the Golden Mean" "Wow, if you look from back here, it looks like pentagons within pentagons within pentagons!" says Angelina. It reminds me a little of MC Escher's work!" Yes, even though Escher was not a mathematician, he drew tessellations that even mathematicians learned from years later. We enjoy them because they are beautiful but mathematicians enjoy them because they tell us a lot about important mathematical concepts such as nonperiodicity and hyperbolic space. 



"Many other artists and architects in the Renaissance used polyhedra and tessellations as tools to make their art more realistic. George Hart of Hofstra University has a great collection information and images from the 15th century onward about polyhedral artists  they were often people we are already familiar with, such as artists Leonardo da Vinci and Albrecht Durer and scientist, Johannes Kepler." She points to a large sketch of polyhedra on the wall. "They were some of the first Europeans to return to the geometries of ancient Greece  works by Euclid, Plato and Pythagoras. These works had been kept hidden for almost 1000 years!" 



"Oh, that polyhedron on the wall sort of looks like the buckminsterfullerene we saw before." says Angelina. "Yes, it actually is the same shape  an icosahedron with all of its tips cut off  a truncated icosahedron," answers Sarah, "In fact it is the same structure that is shared by clathrin, a protein found in your brain. But Leonardo da Vinci sketched this polyhedron, an archimedean solid, and many others as open cage structures in 1509 for Fra Luca Pacioli's mathematical treatise, "Da Divina Proportione." Pacioli was the father of accounting and one of the greatest Mathematicians of his time!" 

"Did you know that in the last ten years of his life, da Vinci devoted most of his time to the study of polyhedra and geometry? He was trying to understand the design principles of nature and he almost stopped painting altogether to focus on his mathematical studies." says Sarah. "Along with Leonardo, other great artists and architects of the Italian Renaissance such as Piero della Francesca, Leone Battista Alberti, and Albrecht Durer explored geometry. The compass, straightedge and ruler  tools of the navigator, astronomer and mathematician  were also the tools of the artist, architect and philosopher. 




Sarah continues, "The great German artist, Albrecht Durer was one of the most devoted geometers of his generation, exploring tessellations and polyhedra as essential tools of the artist. And it is a very little known fact that he is also the father of topology, a very important branch of mathematics." As Angelina clicked on the kiosk to the Paris Louvre page on Durer, Sarah remarks, "Durer and Kepler's quasiperiodic tessellations of the 16th century were revisited by crystallographer Donald Caspar and Roger Penrose in 1996 to better understand the structure of quasicrystals"  
"Hmmm, I always thought math and art and science were so different from each other!" says Angelina. "But now I see so many overlaps." They didn't teach these things about Leonardo da Vinci and Durer in my art classes." "Yes," says Sarah, mathematician Jay Kappraff is not alone in saying that geometry is the bridge between the arts and the sciences. Here is the beautiful polyhedra of goldsmith Wentzel Jamnitzer. He wrote a treatise on perspective for artists in the 16th century." 




"Gee, if I knew geometry was really so beautiful and easy to understand I think I would have liked it more. I don't see any points or planes here." says Angelina. Sarah shakes her head and clicks the kiosk in front of a wall sized sketch. "No, these artists and scientists began with three dimensions rather than one dimension. They made models they could hold to explore angles, symmetry and proportion rather than starting with points, lines and planes. Here is Johannes Kepler's studies of stellated polyhedra. Although we know him for his discoveries in astronomy, he was actually the first scientist to explore spacefilling and to diagram the full family of archimedean solids. he even discovered the rhombic dodecahedron!. I bet they didn't teach you that in your astronomy class!" 

