How long does the fall festival at the place formerly known as MOSI last?
Manchester Science Festival: Manchester Science Festival is an annual science festival held in October in Manchester, England, and produced by the Museum of Science and Industry. Manchester Science Festival:  It runs for eleven days, incorporating over 100 events across Greater Manchester for families and adults. Museum of Science and Industry (Manchester): The Museum of Science and Industry (MSI or formerly known as MOSI) in Manchester, England, is a large museum devoted to the development of science, technology and industry with emphasis on the city's achievements in these fields.
eleven days