Physicists have sent a beam of twisted light 3km through the air above Vienna.
It is the first time that information has been transmitted outdoors using the "twist" of a visible light beam.
This twisting property could allow very fast communication because light with different amounts of twist, encoding separate channels of information, could be sent simultaneously.
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EDITORIAL NOTE: The opinions expressed in the above post do not necessarily reflect those of our editorial team – just in case you wondered. Neil McCauley
