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This is the underground storage facility for the University of Chicago's library. It opened its doors in May this year, relying on a robotic crane to retrieve books every time a user requests one of its 3.5 million items.
Reading material is stored in bins - each holding about 100 books or journals - inside the facility, which extends 50 feet below ground.
Barcodes are used to track each item so the automated retrieval system knows which bin to retrieve an item from when it's been requested.
To see more of the university's high-tech library visit Photos: Robotic library picks books out of the deep.
Photo: University of Chicago/Lloyd DeGrane