Seemingly every connected device has at least one wireless radio in it. However, that often requires some big compromises. Those radios often chew up a lot of power, which isn't always practical with Internet of Things gadgets that may not have much room for a battery. Disney Research may have a solution to that problem: ditch the radios entirely. Its scientists have developed technology that uses ambient radio waves to communicate. The approach uses very low-power sensor nodes to reflect radio waves from virtually any background source, whether it's a distant tower or the phone in your pocket. RFID tags already use a similar approach, but the use of many more sources and multiple channels gives you a much longer range -- in tests, the researchers achieved data links at distances up to 164 feet.