Mathemagician conjures up birthday tributes to Neil Armstrong - NBCNews.com

via brain teasers - Google News http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNHI8m0OxeOnmcTJa81MqmRP9L9Y8Q&url=http://www.nbcnews.com/science/mathemagician-conjures-birthday-tributes-neil-armstrong-6C10850052