A Chicago museum plans to close its doors for a few days next week. The Museum of Science and Industry will be closed to the public next Wednesday through Friday, January 9 through the 11. Workers will use those days to prepare the museum for its 75th anniversary celebration which takes place this year. The museum will re-open Friday, January 12 and will offer free general admission through the rest of January. Normally, the Museum of Science and Industry is open every day of the year except Christmas Day.