In 65 short years, the humble transistor evolved into an artificial life form called Watson, a computer system that recognizes natural language and, in 2011, handily defeated two former champions on the TV quiz show Jeopardy.
It also is the city's largest natural reserve, famous for its ancient system of shallow canals and chinampas, a method of Mesoamerican agriculture that utilises artificial islands for cultivating vegetables, herbs and flowers which is still in use today.