Issue Home Features  Front Line  Perspectives  Focus  Research  Emerging Technologies  Work Perfect Mail  Editor's Desk  Past Issues Submission Guidelines Editorial Calendar Reprints   Closing the waiting gap  University of Toronto researcher’s computer model improves scheduling for hip and knee procedures By David Brandt   The call of the cosmic  Daniel Schumacher stays grounded so that NASA can fly By Monica Elliott   Design components that breathe  Photocatalytic pavement speeds up nature’s process of breaking down pollution By Michael Hughes

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