Book excerpt: The celebrated history of New Haven often overshadows its fascinating and forgotten past. The Elm City was home to America's first woman dentist, an architect who designed the tallest twin towers in the world and a medical student who used toy parts to create an artificial heart pump. The city's share of disasters includes Connecticut's worst aviation crash, a zookeeper who was mauled to death and a fire at the Rialto Theater. Local authors Robert and Kathleen Hubbard reveal the rich and fascinating cultural legacies of one of New England's most treasured cities.