July 4, 2013, 5am PDT
Independence Day is a day to reflect on America's history; and with many of the activities associated with the holiday (parades, fireworks) set on urban stages, it's the perfect occasion to enjoy some amazing images of the country's urban past.
November 8, 2011, 5am PST
Attach a digital camera to a balloon or kite, and what do you get? An easy tool for public participation in land use decisions, says Eymund Diegel of the Public Laboratory for Open Technology and Science.