It is still possible (until April 24) to see a wonderful travelling exhibit 1001 Inventions which previously was shown in Istanbul and London.
More can be found on 1001 Inventions website. But this movie will give a better visual idea about this fascinating exhibit:
Director of NY Hall of Science Eric Siegel proudly showed me and David a permanent exhibit Mathematica. It was designed in 1961 for IBM and is the first interactive exhibition devoted to math.
The long wall of math history starts from approximately 12th century.
pseudosphere -surface with constant negative curvature I was just mentioning in my talk.
This surface is hyperboloid which also has negative curvature on its surface but the curvature is not constant. It is an interesting surface that can be built with straight steel beams. It allows minimisation of wind cross-section while retaining structural integrity with minimal material. Cooling towers is one of the application examples in architecture.
Peter Paul Rubens:
When applied in photography, stereographic projection produces fun images.
Pseudosphere can be seen in another demonstration - about planetary motion. It visually shows black hole idea.
helicoid as the demonstration of DNA structure shows. (In Crocheting Adventures with the Hyperbolic Planes I wrote about the connections between helicoid and catenoid and have pictures of crocheted models that show this connection.)
Also Reye Configuration could use more space (some more pictures of Reye configuration). But of course I understand space issues in exhibits...
I was happy to see the visual depiction of one of my favorite geometry theorems - Pascal theorem (sometimes called Hexagrammum Mysticum Theorem). It is a generalization of ancient Pappus theorem, and Pascal found this generalization when he was only 16!
At the time when Pascal was playing with geometry, he had no idea that this theorem will be later mentioned in projective geometry. There is a nice demonstration of projective geometry in Mathematica. This is a configuration how you see it from the side:
Do not see anything? Good reason to go and visit NY Hall of Science yourself! Much more to see than I can show here, for example, some math magic too:
When we arrived at NY Hall of Science there were many school buses and the hallway was full with happy primary school kids. B y the time we were leaving exhibit halls were mostly empty since school day was over. While I am totally agreeing that we should talk to children about science in early age, I was still thinking about the tendency of turning science museums into children playgrounds. What happens to children curiosity later? Is it consumed by computers and video games and we do not see anymore teenagers in science museums? I remembered my first ever visit to science museum. It was in 1994 in Finland - this year Heureka is celebrating 20 years. It is not as old as Exploratorium or Ontario Science Center, which are twice as old, but still Heureka was one of the first. I have not had a chance to visit it again, so I cannot tell whether I would have the same impression now. But in 1994 we all adults had great fun to look at the exhibits and I do remember many teenagers and adults there and exhibits were engaging us. In US I have met with many people working in science centers and they all confirm the same thing I have notices - science centers are places where parents take their children like they take them to the playground, and children behave there as in playground - they play. It is good first to play but there is no follow up. Except for some volunteers I have not seen any teenager coming to science center - who is going to return to the playground? As a result exhibits are being tailored to the kinder garden level. What happens? Like in NY Hall of Science little kids will pass this very nice Mathematica exhibit - it is above kinder garden or primary school level, it will stay in their memory as something impossible to understand and that's it. I wish I am too pessimistic in these thoughts and wrong...Tapan Zee bridge
According to 2009 AAA report this bridge is "worst of the worst in New York", some say even in the whole country by now. Still in use.
Attitude to safety like this?