A controllable flying vehicle with a single moving part.
Posted 7 years ago by krankster in category: technology   Comments (2)









Just as vinyl records have a pattern of grooves and ridges that contain the sound, talking tapes - which were originally developed in 1918 - work on the same principle. Along the length of the tape is a fine pattern of grooves, and when you run your finger nail along the tape, you can 'play' the encoded message.
Posted 7 years ago by glennMC in category: interesting   Comments (0)